5.1 Surround Sound speakers not working since 7.1 downloaded

I'm not sure what is causing it...But I cannot get my surround sound speakers working with ITunes since I down loaded 7.1. They all work with Windows media player. Is therre any setting I should be aware of?
Dell Dimension E510 Windows XP

I have the same problem and it is driving me crazy. I have an older logitech quadraphonic Z-560 speaker system that I love and have been using for years with never any problems, until I installed Itunes 7.
At first after the upgrade I was completely unable to play any file at all, which was later resolved by updating my SoundBlaster live Audigy card drivers. Now I can at least listen to music but only out of my front 2 speakers. I also noticed my QuickTime player does the same thing only playing out of the 2 front speakers. The issue only exists when trying to play audio through these 2 programs.
I have read all the posts on this issue that I could find yet have not been able to resolve it. I changed all the QuickTime, and creative settings appropriately for my hardware and no luck. I'm running the most current version of divers on windows XP with SP1.
Is it simply an incompatibility issue with my sound card?
PLEASE HELP with any advice!!!
Windows XP Pro

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5.1 Surround Sound speakers not working since 7.1 downloaded

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