I have this same problem, and there are NO new drivers for it.
i also had XP and it worked awesome. now with windows 7 it does exactly how he described it, loads on task bar for a second and disappears. but it is still running in Task Manager, it just doesn't to anything. i have played with the compatibility and nothing worked. tried other driver versions, still nothing.
some help would be gladly appreciated
i found what the error it is getting but do not know how to fix it:
"The ZDPSp50 NDIS Protocol Driver service failed to start due to the following error:
The system cannot find the file specified."