Xcode 4.3.2中的声音问题

I updated to OS X Lion 10.7.3 and to Xcode 4.3.2. I am unable to play a sound on the iPhone Simulator or on the iPhone device with the following code. I am able to play a sound using the same code on Snow Leopard and Xcode 4.2. I have no idea why I am not able to hear the sound in 4.3.2. Can any one help?I updated to OS X Lion 10.7.3 and to Xcode 4.3.