VrayRT for Rhino

I cant seem to get it to work. I ticked the enable box in the RTEngine rollout and the Vray progress window just says “Preparing global light manager” 0%. Left it running for about 10 minutes and its still the same. Is there another option I must enable?

Plugin: V-Ray for Rhinoceros
Plugin Version: 1.48.18242
Host Application Version: 4 (x86)

It would be best to post in the V-Ray for Rhino forum, so that the support guys can pick it up. In any case, does normal rendering work fine?

Best regards,
Vlado

I managed to figure it out in the end. You have to enable DR rendering and add a server in order for Vray RT to work.