Constantly running left/Back

Hope you can help.

I have just installed on PC using a Rocat keyboard an mouse (both with the latest drivers).

When I attempt any game my character moves to the left as if I am holding the A key down. My character may even be going backwards too?

I have tried another mouse and deleted the Rocat drivers but to no avail. However, I did manage to get it to work after deleting the SWBFII folder in my documents and starting up with a normal mouse but this was short lived as I only managed to play one match and then it reverted to the permanent running left issue?

This is really frustrating as I'm convinced it's not a hardware issue. All other games play fine and do not demonstrate this bizarre function.

Incidentally, my Battlefront I does this too?

Thanks in advance to anyone who can point me in the right direction.

Happy Christmas

Mark