MP3 file not playing in Iphone/Ipad

I am palying MP3 files in my application using code

NSString *filePath = [[NSBundle mainBundle] pathForAuxiliaryExecutable:@"congratulation.MP开发者_JAVA百科3"];
NSURL *fileURL = [[NSURL alloc] initFileURLWithPath:filePath];
audioPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:fileURL error:nil];
[audioPlayer prepareToPlay];
audioPlayer.currentTime = 0;
[audioPlayer play];     

I am playing 15 MP3 files All playing well, but one file is not playing it is playing very well i itunes but not in my app Any solution for this strange problem.

Amit Battan

I have to replace the MP3 files