Help with video in on radeon x1950 pro needed

Ok so I have a radeon x1950 pro (256mb) It has 2 x DVI connections and 1 x S-video. It came already built in the machine I'm using so I dont have all the packaging info for the card. From what I've seen reviewed, it supports video in.

What I want to do is run an s-video cable from my digital camera to the pc, then use this as an image capture and video capture direct to the hard drive. However when plugging in the camera I get no response. I know the camera supports video out as i've tested it on the tv and all works fine.

So does the x1950 pro really support video in and if so can it be done through the s-video connection?