SketchUP V-Ray RT GPU issue

mail4bxm

Hi,

I have spent considerable time to find a solution for this issue by googleing it but had no luck. So as last resort I raise this question to smart, experienced chaps, you.
I have an architectural model made in SketchUp. Normally after modelling I do the materials and renderings in 3DS Max but we have arrived to a point where we need to do these in Sketchup. So I fired up the RT engine, with the CPU it all works well, looks as it should be. The CPU is not too fast so I wish to use the GPU. The issue is when I switch to GPU CUDA, all the colours go wrong. Do you know how could I fix this? Please see the images below.

CPU