Hi Im trying to send video (no sound) from my MacBook Pro DVI output to a old analog video mixer with RCA inputs. I have brought what I think is the right adaptor: http://www.amazon.co.uk/Adapter-DVI...2?ie=UTF8&s=electronics&qid=1212760759&sr=8-2 but I cant seem to get a signal. Does my computer need to recognise something is attached to it before it can go in to mirror display mode and send a signal?When I press the detect display button the monitor connected to the mixer flickers briefly. My computer works fine with a standard projector, so I dont think there are any problems with software or my computer. Thanks for any help in advance, Tom.