I have upgraded to Vista, I cant find an audio driver that works.

I currently have soundMax integrated digital audio installed but it doesnt work when Im playing games eg Counter Strike: Source. The driver works fine for everything else.

Support Information:
Device Type: BIOS / Motherboard
Manufacturer: ASUS
Model: P4P800-VM
Interface: Other
Operating System: Windows Vista
Age of Device: < 2 years old
FCCID:

Find it on DriverGuide (http://members.driverguide.com/index.php?action=srch&sm=b&aax=&qa6=122&qa5=1&qa7=1801&dp=2&qm0=P4P800-VM&jmd=and&fzz=d) | Find it with Google (http://www.google.com/search?hl=en&lr=&ie=UTF-8&oe=UTF-8&q=ASUS+BIOS+%2F+Motherboard++P4P800-VM+Windows+Vista+) | Research manufacturer ASUS (http://members.driverguide.com/index.php?action=getinfo&companyid=122)