Dont know what happened there , I was typing then suddenly half my thread was on the site. Anyway check your camera manual to see if there is a Firewire (IEEE1394 ) port. It will most probably be separate to the other ports. It may my marked as DV out. Your computer must also of coure have Firewire card fitted.I think that that is the cause of your trouble. You will also need some software to edit your video in. If you are using XP you will have a copy of Windows Moviemaker already installed. I hope that this helps. Come back with more info about your setup and we will be able to help.
Some laptops and miniDV cameras use an i for the firewire symbol eg my Toshiba's input is called is400 and my Sony camera calls it iLink. As Bagsey says it is all IEEE1394 firewire anyway and as far as I know it is the quickest (and maybe the only way) to get the output from your miniDV camcorder into your PC.
You can fit Firewire cards into a desktop PC and into some laptops if it isn't already fitted.
If your cam is mini dv it will have a firewire port to check your pc go todevice manager and look for IEEE1394 if it says it and there are noyellow marks you should be ok .Remaber when youconnect do so with both pc and cam OFF then put pc on then cam and if cam is in playbackposition windows should bleepand ask what you want to capture to