Importing video from Canon ZR45mc into iDVD

The issue I'm having is when I connect it to my MacBook Pro and perform a "one-step DVD" in the program "iDVD," it records, but it is very jumpy. To better explain, it is not a smooth recording, but instead jumps forward every second or two. So, needless to say, my recording is unwatchable. It's sort of like fast forwarding through the video. I am using a "Firewire 800 cable 9 to 4 pin" connected to my MacBook Pro and it makes me wonder if the signal is not getting through and being received at the same consistency that the camcorder is sending it because there is a window on my Mac that allows me to see the video as it is being played, and when I compare it with the LCD screen on the camcorder it is not keeping up at all. Sorry for the long explanation but I wanted you to have the same information I have so maybe you could better diagnose it for me. Thank you for your time. I should also mention that I had no problem importing into iMovie, so I don't believe it has to do with my firewire cable.