Cubase is losing my controller

After a few minutes, Cubase no longer sees my controller. It is a Edirol PCR-M80 made by Roland, and I am using the windows10 x64 drivers as roland is not going to produce windows drivers for this device. It seems to work fine on stand alone apps. I have tried changing usb ports to no avail. Any help or suggestions would be greatly appreciated.
Thanks :exclamation: