We first consider whether the trial court erred in denying defendant’s pre-trial motion to dismiss the probation violation report. Defendant argues that the modification made by Judge Allen that prohibits the defendant from being in the “presence” of any child under the age of sixteen was unconstitutionally vague and violates the Fourteenth Amendment of the United States Constitution and Art. 1 of the North Carolina Constitution. We disagree.
We hold that in this context the term “presence” is not unconstitutionally vague. First, G.S. 15A-1343(b2)(3) requires special conditions for sex offenders and persons convicted of sexual abuse of a minor including “[n]ot communicating with, be in the presence of, or found in or on the premises of the victim of the offense.” In addition, other arguably more vague conditions have been upheld by our Supreme Court. For example in State v. Hewett, a special condition requiring a probationer to “avoid injurious or vicious habits” was held not to be unconstitutionally vague. 270 N.C. 348, 356, 154 S.E.2d 476, 482 (1967). The term “presence” is arguably more precise than “injurious or vicious habit.” Accordingly, we hold that “presence” is not unconstitutionally vague. This assignment of error is overruled.
*56  We next consider whether the trial court erred in failing to recuse himself from the revocation proceeding. The defendant argues that Judge Allen should have recused himself based on his bias because he was the judge who imposed the sentence modification that the defendant challenged as unconstitutional. We disagree.
The burden is upon the movant to “demonstrate objectively that grounds for disqualification actually exist. Such a showing must consist of substantial evidence that there exists such a personal bias, prejudice or interest on the part of the judge that he would be unable to rule impartially.” State v. Monserrate, 125 N.C. App. 22, 32, 479 S.E.2d 494, 501 (1997) (quoting State v. Honaker, 111 N.C. App. 216, 219, 431 S.E.2d 869, 871 (1993)), disc. review denied, 345 N.C. 645, 483 S.E.2d 716 (1997). The Code of Judicial Conduct does not require a judge to recuse himself in a probation revocation hearing when the judge has obtained knowledge of the facts of the case from previous judicial proceedings. Id. at 33, 479 S.E.2d at 501. Accordingly, this assignment of error is also overruled.
 We next consider whether the trial court erred when it denied defendant’s motion to continue the probation violation hearing made at the beginning of the 10 October 1996 probation violation hearing. Defendant argues that counsel was appointed only three days before the hearing, counsel had inadequate time to prepare and the requested continuance should have been granted. Finding no abuse of discretion, we disagree.
A trial judge’s decision as to whether to continue a probation hearing is discretionary and may be reversed only upon a showing of an abuse of discretion. State v. Hewett, 270 N.C. 348, 354, 154 S.E.2d 476, 481 (1967). The defendant argued that he needed more time so he could subpoena Mr. Mason, an eyewitness in the case against the defendant. At the hearing, the defense counsel stated: “We had thought, erroneously, that the State, having the burden of proof, would have Mr. Mason here to testify.” However, the State argued that Mr. Mason’s testimony would not add anything to the proceeding because there is “nothing about this incident that’s going to be in controversy factually.” After argument the trial court denied the requested continuance. On this record we discern no abuse of discretion. This assignment of error is overruled.
 We next consider whether the trial court erred in denying the defendant’s motion to dismiss the probation violation proceeding made at the close of the State’s evidence and at the end of all the evi*57dence. The defendant argues that remaining as a passenger in a parked car while a child comes to the vicinity of the car not at the probationer’s invitation or calling out “Bye” to children thirty feet away as you leave cannot be construed as being in the “presence” of a child. Defendant argues that the State cannot prove that the defendant was “willfully” in the presence of the child which is required by the statute. We disagree.
A motion to dismiss requires a judge to consider the evidence in the light most favorable to the State, and to give the State the benefit of every reasonable inference that could be drawn from the evidence. State v. Russell, 15 N.C. App. 277, 279, 189 S.E.2d 800, 802 (1972).
In a probation revocation hearing, our Courts have continuously held that a suspended sentence may not be activated for failure to comply with a term of probation unless the defendant’s failure to comply is willful or without lawful excuse. State v. Robinson, 248 N.C. 282, 103 S.E.2d 376 (1958); State v. Huntley, 14 N.C. App. 236, 188 S.E.2d 30 (1972); State v. Foust, 13 N.C. App. 382, 185 S.E.2d 718 (1971). The mere finding of fact by the trial judge that the defendant had failed to comply, and that the fact of noncompliance required revocation of probation is insufficient to support the judgment putting the suspended sentence into effect. State v. Robinson, supra, 248 N.C. at 287, 103 S.E.2d at 380.
Here, the evidence shows that the encounter with Isaac took place while defendant was a passenger in his own car driven by his nineteen year old niece. Because the car was the defendant’s and defendant was being driven around by his nineteen year old niece, the court could properly conclude that the car was controlled by defendant. Though defendant himself did not call Isaac, when Mr. Mason called Isaac to come over, defendant did not leave or act to prevent being in Isaac’s presence. Defendant participated in a brief conversation in Isaac’s presence at the car after Isaac came up. Though the encounter was not initiated by the defendant, defendant did remain and converse while Isaac was present. When defendant and his niece drove into the driveway, he saw Isaac and several other children under the age of sixteen in the yard playing football. When Mr. Mason called Isaac over to the car, defendant had a duty and obligation to comply with his probation conditions and immediately leave the premises. Because the defendant did not leave the premises immediately or take another action to avoid being in Isaac’s presence in *58accordance with his probation conditions, the defendant’s failure to comply with the probation conditions was willful. Accordingly, this assignment of error is overruled.
 We next consider whether the trial court improperly considered a letter from the Department of Social Services and a letter from Mary Gratch-Adams, District Administrator of the Guardian Ad Litem program, both of which discussed defendant’s sexual offenses against Isaac Spencer. Defendant argues that the trial court should not have been influenced by prior acts which did not result in criminal charges ever being filed. We disagree.
The trial court is not bound by strict rules of evidence in probation hearings and the probation violation alleged need not be proven beyond a reasonable doubt. State v. Tozzi, 84 N.C. App. 517, 521, 353 S.E.2d 250, 253 (1987). All that is required is that the evidence be sufficient to reasonably satisfy the judge in the exercise of his sound discretion that the defendant has willfully violated a valid condition of probation. Id. Because formal rules of evidence do not apply at a probation revocation hearing, a probation officer’s written report of a probation violation is admissible in evidence. Id.; State v. Dement, 42 N.C. App. 254, 255, 255 S.E.2d 793, 794 (1979). There is no basis to treat letters addressed to the court from DSS or a guardian ad litem which address the defendant’s violation of a probation condition differently from a probation officer’s violation report. Accordingly, this assignment of error is overruled.
 Finally we consider whether the revocation of defendant’s probation constituted a violation of his Eighth Amendment constitutional guarantee against cruel and unusual punishment. The defendant argues that activating a ten year sentence based on these facts constitutes cruel and unusual punishment. We disagree.
If ’’the punishment imposed does not exceed the limits fixed by statute, it cannot be considered cruel and unusual in a constitutional sense.” State v. Cleaves, 4 N.C. App. 506, 508, 166 S.E.2d 861, 862 (1969). Defendant’s sentence, as modified, was imposed to punish his convictions for offenses including an attempted first degree sexual offense and two attempted first degree rapes. The punishment was awarded for his misconduct and was suspended upon certain specified conditions. His violation of the conditions triggered activation of his sentence. In the order activating the sentence, the trial court reduced defendant’s sentence from 20 years to 10 years incarceration. Accordingly, we hold that his sentence does not violate the Eighth *59Amendment constitutional guarantee against cruel and unusual punishment. This assignment of error is overruled.
Judge WALKER concurs.
Judge WYNN dissents.