Does anyone use a Matrox with AE 7? Please, help me...

Hi, I have a Matrox RTX 100 for capturing and I also use it for realtime preview my comps on a TV screen. It worked perfectly in AE 6.5, but now in AF 7.0 it's got a lot of problems, sometimes it works well, sometimes only in some parts of the screen, sometimes (most) it doesn't work at all..

Does anyone have it? Do you know what's wrong?