K8055 on a W2003 SP2 server Problems

I have a problem with the K8055D.DLL on a W2003 SP2server.
Only the V1.0 DLL works (very very slow), I’m using 2 K8055 cards so the switching between cards is very slow (not usable for my purpose).
I’m building a VB (2003) application to interact with the IIS server.
But even the demo software doesn’t work on the W2003 server.