Has anyone been successful in using a hub to connect multiple cameras via USB to their laptop? I'm testing out some cameras and I have 3 connected directly to the laptop w/o using the hub and they work fine. When I connect them to the hub and then to the laptop I only get the camera thats built in to the laptop, the others are blank/black screens. Not sure if I'm using the wrong hub, or it just won't work this way. Everything I am using is rated for USB 2.0. Any thoughts or known hubs that worked, I would appreciate it.