Audio problem with GA-EP45-DS3P motherboard

I recently bought a GA-EP45-DS3P motherboard from Gigabyte, which has an on board sound card. However, after having installed the drivers on the CD i got with the motherboard, i couldnt play any sounds except the standard windows sounds (intro/outro, small pop sounds from bubbles in the tray etc.), and windows kept telling me it had found new hardware and wanted to install driver. Ive tried downloading new drivers from http://www.gigabyte.com.tw/Support [...] uctID=2841 but it still didnt work.

At last i gave in and let windows try to find drivers for the sound card but it didnt seem to work.

Has anyone tried this before, or got any ideas for fixing this problem?

Thanks.

Im running windows xp pro.

The drivers from the CD were:
Microsoft UAA Bus driver for High Definition Audio
Version:5.10.0.5010
Size:2.98MB
The Microsoft UAA (Universal Audio Architecture) Bus driver provides support for High Definition Audio (Azalia). This driver is designed to work with the following versions of Windows:
1.Microsoft Windows Server 2003
2.Microsoft Windows XP Service Pack 1/2 (SP1/SP2)
3.Microsoft Windows 2000 Service Pack 4 (SP4)

And
Realtek HD Audio Driver
Version:XP=5.10.0.5618-VISTA=6.0.1.5618
Size:93.68MB
Realtek High Definition Audio Driver

(copypasted from the info on the cd)