Problem with Vray 1.2.6 for mac (Black Render)

Hello,

i use imac with osx 10.8.3

i have cd4 r13 and i just installed vray 1.2.6

the vray settings appear inside c4d

but the render is all black and render time always is 00.00.00

any help?

i installed it many times but still the same problem.