Hi, I need your help guys. Here are my problems:

I'm using Virtualdub ver 1.9.10 to capture video from satelite TV without problem so far. Recently, I try to backup my old VHS videotape by playing it on video cassette player and capture it via Virtualdub, and my ordeal begin..!! From VD, I still can see the output display but it behave strangely by showing the video as my player was stuck repeatedly. Instead of showing the video frame by frame (e.g: 1,2,3,4,5,6,7,8), the video showed 1,2,3,2,3,2,3,4,5,6,5,6,5,6,5,6,7,8....know what I mean? Playing back the tape on TV directly show no problem at all and it run smoothly except the quality of VHS display which I have to compromised. Capturing by switching off the display also show the same result on the captured video. I try switch the video player with satelite TV decoder and no problem happen. Can anybody help me please..???

Here are my system Info:

1. Windows Vista Ultimate SP2
2. ASUS P5N32-SLI Premium MoBo
3. ATI X1900 Series VIVO 512 MB PCI-e Graphis Card
and
4. JVC HR-72K video cassette player

S-Video and RCA input are all produce the same problematic result when capturing from video player.