ENTTEC USB DMX PRO not recognised by windows but was before?

Hi,
I'm wondering if anyone can help me with an ENTTEC USB DMX PRO box not working anymore on Paralells. It works fine on other windows PC's and even my Mac side. I have tried updating the firmware, uninstalling and installing. VCP & FDTI Drivers updated. Someone said it could be the mac grabbing the drivers before paralells but have no idea on how to stop this? It used to work flawlessly but stopped about a year ago and i've just recently bought the latest version of Paralells and still nothing. I plug it in and it asks Mac or windows. Whenever i press windows, Device Manager see's it but is not able to use it no matter what I do?

Any help would be gratefully appreciated it's really frustrating me as i've tried everything, even fresh installs.

Thanks!

B