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[refreshe]

Try using the SoundEffect class files from the metronome example from Apple. It has some console messages that are printed if there's a problem loading sound files etc. It could give you a better idea of what's going wrong.


SoundEffect.h

#import <UIKit/UIKit.h>
#import <AudioToolbox/AudioServices.h>

@interface SoundEffect : NSObject {
    SystemSoundID _soundID;
}

+ (id)soundEffectWithContentsOfFile:(NSString *)aPath;
- (id)initWithContentsOfFile:(NSString *)path;
- (void)play;

@end

SoundEffect.m

#import "SoundEffect.h"

@implementation SoundEffect
+ (id)soundEffectWithContentsOfFile:(NSString *)aPath {
    if (aPath) {
        return [[[SoundEffect alloc] initWithContentsOfFile:aPath] autorelease];
    }
    return nil;
}

- (id)initWithContentsOfFile:(NSString *)path {
    self = [super init];
    
    if (self != nil) {
        NSURL *aFileURL = [NSURL fileURLWithPath:path isDirectory:NO];
        
        if (aFileURL != nil)  {
            SystemSoundID aSoundID;
            OSStatus error = AudioServicesCreateSystemSoundID((CFURLRef)aFileURL, &aSoundID);
            
            if (error == kAudioServicesNoError) { // success
                _soundID = aSoundID;
            } else {
                NSLog(@"Error %d loading sound at path: %@", error, path);
                [self release], self = nil;
            }
        } else {
            NSLog(@"NSURL is nil for path: %@", path);
            [self release], self = nil;
        }
    }
    return self;
}

-(void)dealloc {
    AudioServicesDisposeSystemSoundID(_soundID);
    [super dealloc];
}

-(void)play {
    AudioServicesPlaySystemSound(_soundID);
}

@end

Playing sound

SoundEffect *soundEffect = [[SoundEffect alloc] initWithContentsOfFile:[mainBundle pathForResource:@"sound1" ofType:@"caf"]];

[soundEffect play];