Vista - Vista x64 Realtek HD no sound 5.1 speakers

OK so i have vista 64 i use an AIVA home cinema system which is connected through the optical cable to the pc under XP i can configure to have 5.1 speakers in vista the only way i get to see the speakers is if i disable the "front panel jack detection" otherwise i see this [IMG]file:///C:/Users/Kyo/AppData/Local/Temp/moz-screenshot-2.jpg[/IMG] When i disabled it i get this

Ok When the speakers are default i get no sound if the digital output is default i get a sound but its 2 channels only any idea how to fix it? Thanks in advance[IMG]file:///C:/Users/Kyo/AppData/Local/Temp/moz-screenshot.jpg[/IMG][IMG]file:///C:/Users/Kyo/AppData/Local/Temp/moz-screenshot-1.jpg[/IMG]