You have to go into the Bios and disable the sound that way, then Download the Wave driver here
http://www.digidesign.com/download/wave/
make sure the AISO driver isnt intstalled on your computer or the WAVE driver wont work. At least thats what I was told. If you did a recommended install of PTLE instead of a custom install that ASIO driver is probably installed already and you have to remove it. Im not sure how to remove it though, you might have to do some searching.
Gene