Are you talking about mp3 mixes or do you mean real audio streaming mixes (or both?).
I’m not familiar with the latest version of Real player as to be honest I wouldn’t let that crap on my PC, but it wouldn’t surprise me if it’s taken over as the default music player program & is causing your problems.
If you’re willing to lose that program then uninstall it & install a better program like Winamp to play your mp3s & Real alternative with Media Player Classic to play real audio files.
I think that will sort your problem, if not then post back with more details of what the problem is. http://www.winamp.com/ http://www.afterdawn.com/software/video_software/video_players/real_alternative.cfm