What do you mean by "point to it"?
In Options-Preferences-Video, what is the video capture application?
It should be, C:\Program Files\Sony\Vegas 6.0\VidCap60.EXE
When I have V6 point to C:\Program Files\Sony\Vegas 6.0\VidCap60.EXE as the default folder, it will not start up Vid Cap. If I have it point to C:\Program Files\Sony\Vegas 5.0\VidCap50.EXE I can use Vid Cap 5.0 from V5 that is still on my computer. I just can't figue out why it won't start up. I've tried with and without Media Manager on.