Not able to play the song

For some songs i am not able to play. Getting one error message if i pass the error in this method - (Sound *)initWithContentsOfURL:(NSURL *)URL. and the error is " Error Domain=NSOSStatusErrorDomain Code=1685348671 "The operation couldn’t be completed. (OSStatus error 1685348671.)"". I am using MAC osx 10.7 and X-code 4.6.3. and the same project is working fine in MAC OSX 10.8.

SoundManager is not working in 10.7.5 for some songs. In SoundManager.h file, if i change the condition
#if __MAC_OS_X_VERSION_MIN_REQUIRED > __MAC_10_6
to
#if __MAC_OS_X_VERSION_MIN_REQUIRED > __MAC_10_7
its working, but if the user use slider its not working.