Photoshop not rendering
 

Hi

Im using DisplayLink to connect to a DELL P2414H monitor and im having trouble using the very latest version of Adobe Photoshop (CC 2015.1.2).

It opens fine. But nothing appears on my canvas. So its not rendering anything visible. If i move it over to my mac screen i can see it....but not on the DELL.

Im using a MacBook Pro.
MacBook Pro (Retina, 15-inch, Mid 2015)
2.5 GHz Intel Core i7
16 GB 1600 MHz DDR3
AMD Radeon R9 M370X 2048 MB

Any ideas?

Thanks
Brad