jdominicis - Have you tried rebooting the computer, and trying to plug your webcam directly into your computer instead of into a USB hub if it isn't already? You can also try connecting your webcam to a different USB port on your computer to see if that has any affect.
Are you sure that the iCamSource isn't already running, and you're not trying to connect to the same camera more than once? Rebooting your computer should remove any doubt in that respect.