I had the same problem there, I think. Can't really be sure.
If you haven't fixed it yet:http://driverscollection.com/?file_cid=40847447025eb9a86f1ed0fde01
Go there and download the drivers.
Meanwhile, (The driver might take a while to download) open the control panel and choose "Add or Remove programs" and remove Z-engine.
When the download is finished just re-install it.
If that doesn't fix it I cannot help you any further. Suggest you head on out in that GIGANTIC world of forums and try your luck there. =)