PiMax Flashing beteen Red and green?

I got my PiMax in a few days ago I got from eBay. I installed all the software and drivers and SteamVR I’m using a Nvidia 970 GPU 4 core CPU windows 7

I have the HDMI cable plugged into the 970 and the USB to the dedicated USB port. When in debug mode I see it says disconnected. When I plug in the USB it then says connecting and nothing further happens.

Please Help,

Thanks

What version of pimax software are you using?