Video output disabled

Hi,

I've used Color for grading the past but not with my new Macbook Pro (15"/4Gb). I cannot seem to get the video preview to work. Checking the User Prefs under setup I find that video out is disabled and all cjoices in the pop-up are greyed out. I have a Cinema 20 which I have used in the past and is provideing display of scopes but not the video.

Any ideas?

Thanks,

David

Having the same problem any who could offer some insight?