What is the model name?
Such as:
Ctreative Sounblaster Live Extreme
Sound blaster 5.1 Live Value
Are you running 32-bit or 64-bit?
Is it a laptop or Desktop?
I know they released beta drivers for the Creative X-Fi Extreme and those solved my problems.
Try this link to identify our model:
http://support.creative.com/kb/ShowArticle.aspx?sid=6843