Problem is not the sound card or the motherboard.. Problem is while Creative are great at making hardware, they are not as good at development of software. Their drivers are just crap compared to the hardware they produce.

Instead, goto this site: http://kxproject.lugosoft.com and get the drivers there. Any Creative Labs Audigy or EMU10k1-based soundcard, or E-mu Systems APS soundcard can be used with these drivers. some card such as Audigy LS and Audigy 2 NX are not compatible, but the ZS, Platinum, etc.. are.

Give em a try...