Hi coachreed,
I had the same problem at the beginning. My Problems (think so) caused because i have a USB keyboard and Mouse. I think the Powermate driver has Problems when there are more HID-Interfaces than his owne. I unplugged any HID-Interfaces and then only plugged in the Powermate. And than it worked. After this you can pluggin the Keyboard and Mouse. It should be working. I have the same Driver (1.5.2) from the Website. Sometimes the Powermate don't worke again and I must restart the procedure with unplugging and then plugin the Powermate...
P.S: Sorry for my
english