Yeah, the soundblaster live and audigy cards dont like the chipset that is used with this mobo. The chipset, made by VIA, conflicts with the soundblasters. My suggestion is to just go with a Turtle Beach Santa Cruz. I am building a comp and thats what I am using. I hear it is a better choice with better drivers and sound.
Also if you are going with an audigy sound card i have been told not to use it with Windows XP. This guy called it the "squeal of death" it just crashed. If you want to stick with a soundblaster you can try to update the chipset drivers from VIA, i think they are called 4 in 1 drivers, not sure though. Personally I wouldn't want to deal with all the crap, I would just go with Turtle Beach.