Appellant, Sherman Guy, brings this appeal from an order of the Sebastian County Circuit Court denying him post-conviction relief pursuant to Ark. R. Crim. P. 37. On May 7, 1980, a jury found appellant guilty of promoting prostitution and being a felon in possession of a firearm. Appellant was sentenced to two years for promoting prostitution, which was suspended, and two and one half years for being a felon in possession of a firearm. No appeal was taken from this verdict. On September 8, 1983, the trial court held a hearing on and denied appellant’s petition for post-conviction relief *426alleging ineffective assistance of counsel. On appeal we affirm.
On December 14, 1979, Bettye Faye Lewis, a nineteen year old prostitute was arrested. She admitted to the arresting officers that she was in Fort Smith for the purpose of prostitution and agreed to leave. The officers took her to the motel where she shared a room registered in her name with appellant in order to get her clothing. There, the officers saw in plain view an open briefcase containing, among other things, a .25 caliber pistol. At trial testimony was admitted that the briefcase and gun belonged to appellant, that she was “turning tricks” for appellant, and that she was scared of appellant.
Appellant argues that his counsel was ineffective in omitting to submit a motion for discovery but fails to show how he was prejudiced by the omission. The mere allegation of ineffective assistance of counsel due to failure to make a motion absent a showing of prejudice is insufficient to establish ineffective assistance of counsel. Appellant must show he was prejudiced by the conduct of his counsel and that the prejudice was such that he failed to receive a fair trial. Blackmon v. State, 274 Ark. 202, 623 S.W.2d 184 (1981).
Appellant next argues that his counsel was ineffective because he did not file a motion for severance of offenses, alleging that he was “absolutely entitled” to such a severance. Appellant is mistaken. A defendant has a right to severance “whenever two (2) or more offenses have been joined for trial solely on the ground that they are of the same or similar character.” [emphasis added] Ark. R. Grim. P. 22.2. Here the question of severance was discretionary since the offense of possession of a firearm could not have been proven without introducing evidence of the offense of promoting prostitution. Ruiz & Denton v. State, 273 Ark. 94, 617 S.W.2d 6 (1981). Also, some consideration may be given to the fact that the proof of both offenses, one for promoting prostitution and one for possession of a firearm by a felon, rested primarily on the testimony of one witness, the prostitute. Henry v. State, 278 Ark. 478, 647 S.W.2d 419 (1983).
*427Appellant then argues that the fact that his counsel did not file a motion to suppress the firearm constituted ineffective assistance of counsel. The firearm was found in plain view in an open briefcase belonging to appellant in a room registered to the prostitute who was sharing the room with appellant. Under these circumstances defense counsel cannot be said to be ineffective for not filing a motion to suppress.
Appellant further points to his counsel’s failure to move for directed verdict. We have previously held that where there is a question of fact, that fact must go to the jury and to take the question away from the jury by granting a motion for directed verdict would be error. Harris v. State, 262 Ark. 680, 561 S.W.2d 69 (1978). Appellant may not challenge the sufficiency of the evidence on which he was convicted by pointing to his counsel’s failure to move for directed verdict. Challenges to the sufficiency of the evidence are a direct attack on the conviction which must be made on direct appeal. As such, the issue is not cognizable under Rule 37. McCroskey v. State, 278 Ark. 156, 644 S.W.2d 271 (1983).
For this last point appellant contends that his counsel was ineffective because he did not appeal the case. The record reflects that the attorney in question specifically testified at the Rule 37 hearing that he was not asked to file an appeal. Under these circumstances, we cannot say the finding of the trial court was clearly against the preponderance of the evidence.
Appellant concedes that “perhaps a failure on one area would not justify post-conviction relief” but goes on to argue that we should examine the cumulative effect of his counsel’s omissions. We have previously refused to recognize cumulative error in allegations of ineffective assistance of counsel. Henderson v. State, 281 Ark. 306, 663 S.W.2d 734 (1984).
A presumption exists that counsel is competent. Thomas v. State, 277 Ark. 74, 639 S.W.2d 353 (1982). To overcome that presumption, appellant must show by clear and convincing evidence that he suffered prejudice by the *428representation of counsel and the prejudice was such that he did not receive a fair trial. Blackmon v. State, 274 Ark. 202, 623 S.W.2d 184 (1981). On appeal we will reverse the trial court’s denial of post-conviction relief only if its findings are clearly against the preponderance of the evidence. Thomas v. State, supra. Here we cannot say the findings of the trial court are clearly against the preponderance of the evidence.
Affirmed.