Sound issue in device
===

    NSString *musicPath = [[NSBundle mainBundle] pathForResource:@"ding" ofType:@"mp3"];
    if (musicPath)
    {
        if(TapSoud)
        { 
            [TapSoud release];
            TapSoud = nil;
        }
        TapSoud = [[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:musicPath] error:nil];
    }
    
    [TapSoud setDelegate:self];
    [TapSoud prepareToPlay];
    [TapSoud play];
    
	
	NSString *musicPath1 = [[NSBundle mainBundle] pathForResource:@"roadrunner" ofType:@"mp3"];
    if (musicPath1)
    {
        if(MatchSoud)
        { 
            [MatchSoud release];
            MatchSoud = nil;
        }
		MatchSoud = [[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:musicPath1] error:nil];
    }
    
	[MatchSoud setDelegate:self];
	[MatchSoud prepareToPlay];
    
    NSString *musicPath2 = [[NSBundle mainBundle] pathForResource:@"Wrong Answer" ofType:@"wav"];
    if (musicPath2)
    {
        if(WrongMatchSoud)
        { 
            [WrongMatchSoud release];
            WrongMatchSoud = nil;
        }
		WrongMatchSoud = [[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:musicPath2] error:nil];
    }
    
	[WrongMatchSoud setDelegate:self];
	[WrongMatchSoud prepareToPlay];




This is the peace of code which is working properly in simulator.

But in the iPhone device it is not working.

Sound is not generated in the device.

What is the problem over here...?