I am using DVB-S card and MyTheatre program and using nvidia pure video decoder,

now when I enable Hardware Acceleration, it gives me a nice boost 50 FPS but there is flickering on channels logo like MTV, TPS. Disabling hardware accelerator no more flickering, but the image is not smooth 25 FPS. any ideas what should I do to get full 50 fps and smooth playback without flickering on channels logo ?
it is some kind of bobbing up and down about 1-3 pixels only when I enable hardware acceleration with all video decoders same result. I tried also vmr7 and 9, is that a display driver bug or my sat card ?

any ideas?