Problem capturing from a video player

[lancer]

I have pinnicle studio 9 and i am using a capture card, all hardware is connected fine, but when i try to capture a video to mpeg2 on my computer at work, the image is fine the audio is fine, but halfway through the outputted mpeg2 file the audio and video start to get out of sync, so the audio is about 1 sec ahead of behind of the video, any one got any ideas?