No stereo sound after iTunes 8 upgrade

Newbie here.
I upgraded to iTunes 8. ITunes see my remote hifi system via Airport Express but there's no sound from the remote speakers. However I have sound through same system using my laptop with iTunes 7.
Would greatly appreciate help to solve this problem.

Hello, wongjai.
You might be better off posting this problem over in the AirPort for Windows forum here on the Apple Discussions.
Good Luck!

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