App Quits when button is pressed
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i am making a soundboard app and when i run it in Xcode, after i click one of the buttons to play the sound i get an error. This is the Log of the crash

2012-07-14 20:24:34.395 SoundBoard[15374:c07] Could not load the "BG.png" image referenced from a nib in the bundle with identifier "Apple.SoundBoard"
2012-07-14 20:24:41.645 SoundBoard[15374:c07] -[ViewController playSound1]: unrecognized selector sent to instance 0x93a99b0
2012-07-14 20:24:41.648 SoundBoard[15374:c07] (null)
libc++abi.dylib: terminate called throwing an exception
(lldb) 

Any help? i can't figure it out

Thanks
