I have Bootcamp 3.1 and Windows Vista Home 32bit is fully up to date. The audio on my Mac Pro 2008 will play out of the front speaker but will not through my Klipsch 2.1 system. I checked and rechecked to make sure I have the audio cord plugged into Audio Out on the back of the Mac. When using OSX the audio plays just fine through my 2.1 system. Any ideas on what I can do to troubleshoot the issue?