go here u might have to go back and select your card though as its on my settings right now then you can click on software updateon the right hope this helps , you probably best deleting your software first before you update !
http://support.creative.com/Products/ProductDetails.aspx?catID=1&subCatID=205&prodID=149&prodName=Audigy 2&subCatName=Audigy&CatName=Sound+Blaster#Manualselection
john, May 2009