Video-8 (8MM) Problems digitizing them

[Solid_State]

I have a bunch of 8MM cassette tapes that I recorded with a Canon ES-190 (Which was stolen from me ) but today I picked up another camera to try and digitize my cassettes while they are still in playable condition (Which they are)

The camera I picked up is an Olympus VX-802 from 1988 (The recorder was the Canon ES-190 from 1999) and just Video 8/Mono audio like the Olympus

The camera works perfectly when displayed on the TV screen (No picture jumps or drop outs).

But when hooked up to a computer the picture jumps and drops out every couple of seconds (The audio is fine though)

The capture card is a Hauppauge PVR-150 MCE and the computer is an HP D530 CMT with a Pentium 4 3.20GHZ/2GB Ram and XP Professional

I also see that same jump/drop out even when in camera mode and also when the tape is stopped
Is there a way to fix this? or are my cassettes forever analog

Thanks