inspiron e1505 sound issues in gaming mode

I have an Inspiron e1505 with the creative upgrade, I get a buzz when I play America's Army. (most recent installs). I have not noticed it in any other games yet. This is one of many games I installed. The sound is clear for Battlefield 2, and for some other games, although there is some popping on occasion but not a buzz. any help would be very appreciated. I really like to play these games. Computer is only a month old and I pretty sure that the latest drivers are installed..


Inspiron E1505,
Intel Core Duoprocessor T2050 (2MB/1.60GHz/533MHz)
15.4 Inch UltraSharp TrueLife Wide-screen WXGA+
2GB, DDR2, 533MHz 2 Dimm
256MB ATI MOBILITY RADEON X1400 HyperMemory
160GB 5400RPM SATA HARD DRIVE I6400/E1505
Microsoft Windows XP Media Center Edition 2005
Integrated 10/100 Network Cardand Modem
8X DVD+/-RW Drive
SoundBlaster Advanced Audio for XPS M1710
Intel PRO/Wireless 3945 802.11a/g Mini Card (54Mbps)



Thank's alot,
erbch