I am making a soundboard app and i am using sounds with over 30sec duration. I am playing the sound by connecting in IB my action with a "touch down" event, however the sound keeps playing once started. I connected in the some button a "touch cancel" & "touch up outside" event that is supposed to stop the sound but for some reason it doesn't. Can anybody provide a solution to my problem?

---Edit--- Here is my code:

-(IBAction)playSound:(id)sender {
     NSString *soundFile;
    soundFile = [[NSBundle mainBundle] pathForResource:@"testSound" ofType:@"mp3"];
    audioPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:soundFile] error:nil];
    audioPlayer.volume = volumeSlider.value;
    audioPlayer.numberOfLoops = -1;
    [audioPlayer prepareToPlay];
    [audioPlayer play];
}

-(IBAction)stopSound:(id)sender {
    [audioPlayer stop];
}