The JoyPad plugin works with PP and USS as that was the hardware I hat to test it with.
The behavior you describe has been reported in this thread for ESS Controller - Someone got it to work, I think it was something with switching the jogging mode before using the sticks, but you have to read through the postings in this thread to find the solution.
Let us know if you get it to work and how

The real fix would be to update the plugin, but that requires that I have an ESS Controller, a test setup and time to do the programming...
For me this was/is a spare time project with no earnings.
I can understand that is was tricky to get things working in Windows 8. Maybe you could make a post, explaining how you got it installed - others might struggle with the same problems and could use your input.
- Joakim