Ibm Audio Driver>ibm, I Have An Ibm Z60t And It Was Upgraded To Vista. Now I Have No Sound But Drivers Are In. Why? How To Fix?

I have an ibm z60t and it was upgraded to vista. now i have no sound but drivers are in. Why? How to fix? - ibm audio driver>ibm,

I have the high definition audio device and I downloaded IBM Z60t Audio Driver for Vista 32 ... and they were both working on, etc.
but I have no sound ...