Problem recording from Pandora with Replay Music: recorded files are breaking up or crackling

Hi,I'm trying to record pandora.Everything seems to work fine,but when playing the recorded files they are breaking up,or kinda crackling.It is very frequent.None of this is noticed when playing pandora or while recording.I can use line in to record with a program like audacity and it is fine.I've tried disabling my firewall,antivirus,and closed everything I could find running in the background with same results.
I'm using replay version 3.75,on a vista 64 computer with realtek hd audio.
Anyone know anything I could do to help?
Thanks a lot, Frank