You need to provide exact system information before peopel can even begin to guess. and on a more general level: Compressed audio is evil for any form of editing. Convert the fiel to a WAV/ AIFF using a suitable tool.
Sorry Mylenium, didn't know that you got angry.
The only thing I asked is if there is a difference between the CS6 and CC version.
I tested on the same system with the same audiofile