Need answers or direction

I recently purchased an imac 24" with intent of video editting some of my mini dv's. My camcorder is a jvc gr-d375u equip with a 4 pin firewire out. I did some minor reasearch and purchased a 9 pin to 4 pin cable from the apple store. Unfortunately, my mac doesn't see it. I've restarted, etc. checked out importing in imovie and iphoto but it just don't reconize the connection. Any idea's or am I sending the cable back?

 

No question is stupid. Failed attempts:
1. plugged cables into both machines and powered up. cam on playback. opened imovie and attempted import from drop down menu.......nothing
2. attempted to import using cam import icon above the editting window. only saw the onboard camera and not the jvc.
3. unplugged and plugged in cords while powered up.....nothing.
4. changed settings on camera and search camera menu for settings related...nothing
5. looked around imovie for some other way for importing video that I may have missed.
6. opened idvd and attempted to create a magic dvd....nothing
7. attempted steps 1-3 through iphoto...nothing

Any more suggestions other then smashing the camera since I'm beginning to go insane. I'm praying for a simple solution since I'm a newbie.

 

I would eliminate item #2 since my previous PC located the camera and I was able to transfer so much of my video. Unfortunately my FW card crapped out and that was that. I replaced that PC with this mac of course. I got a friend up the street with a mac so I guess I'll be calling him after work. I'm hoping its the cable! Process of elimination although I was hoping I missed some keystroke or some import technique. Can't win 'em all.