put up a cry for help on Ubizoo and got this reply: 
For Vista but might work in Win 7 (back up registry first just in case) 
"Click Start, type regedit into the program window at the bottom and then press Enter. 
In the Registry Editor click the plus sign next to the following folders in order: 
HKEY_CURRENT_USER 
System 
CurrentControlSet 
Control 
MediaProperties 
PrivateProperties 
Joystick 
OEM 
and delete any folders in there starting with VID_06A3. 
Now unplug your controller, reinsert it and the forces should now work." 
Of course, I do not recommend mucking around in the registry unless you are experienced in doing so. I also recommend backing-up the Registry before beginning.