Connect does work with IEEE1394 Firewire Cams, just not with
all Firewire Cams. (USB cams also are not all working).
I would suggest to first try out the cam from different
machines with different OSs (Vista might well be the sole issue
here), also try if you can get an ordinary USB cam to work.
If all fails, you can workaround that using a virtual camera
driver, piping the firewire cam into the virtual cam and in Connect
you can load the virtual cam with the image of the Firewire cam.
Not a nice way round, but it would work.
If you google for "Adobe Connect camera compatibility matrix"
you get a "slightly" outdated list of supported cameras.