You should not experience problems with that specification. I personally use premier 6 to capture/edit video footage from my camcorder, without problem and my spec is not as good as yours.
Have you tried watching the video in Nero vision express. If it plays satisfactorily in Nero, then you should have no problem recording from there to your hard drive.
If you still experience problems, suggest you try reinstalling the drivers, using the hardware wizard and pointing it to your INF folder and selecting 1394.inf