hi, When i try to listen to an apple loop in logic 7.2 i get an error saying "the audio file ..... .caf has a 0 bit format and cant be used.this started after i installed logic 8.what is the reason for this and what can i do not to get this error?

The appleloops installed by Logic 8 are in the new .caf format. Unfortunately, this format is not compatible with earlier version of Logic.