Video capture issue

I've looked around quite a bit and haven't seen anything that really helps:
Using WMM to capture video from my JVC mini digital the results are that I
can control my camcorder, stop, start, using WMM controls. WMM is in control
of my camcorder. I'm using a firewire that Windows says is OK. My camcorder
shows up in Control Panel and checks out as OK. I have checked the camcorder
literature as far as dubbing goes and it looks OK.

The issue is that I can not see the preview and I get an error message that
no video was captured check your camcorder and capture device to see if they
are properly configure.
As far as I can tell they are properly configured.

I have a new Dell computer with 1 G memory. WinXP multimedia edition.

All assistance will be greatly appreciated.