After installing the voodoo 2 driver for win 2000/XP (Glide +OpenGl) and rebooting , I recive the following message :
Genport I/O initialization failure .
This message  is generated by run32dll.exe.
Also the voodoo2 tab is not present ,but in the device
manager the voodoo2 is listed and the system tells me
that his status is OK . (?)
Also in games the driver is prezent  but it cannot be enabled.(Quake 3 for example)