More video capture problems

Ugh, I cant stand trying to figure this out anymore. I wanted to get my sony trv260 digital camcorder footage onto my computer so that I could edit it with adobe premiere. I went out and bought a firewire cable and a firewire port. I hooked it all up and it works as it should so far. I can see the footage on the computer as it is playing, very smoothly I might add. Then I hit record, and everything goes downhill from there, The video skips and lags and chops and just does not capture because of that. What is the problem? This is so frustrating, :sleep: I have no idea why my camera will not transfer to my computer and Im sick of buying more things to make it work, cuz they just make more problems, the USB cables it came with dont even work either, they too just skip and lag, but 10x worse. Help…