[devicenull]

Try putting the camera into demo mode (use the user button on the front, its in the docs somewhere)

This should have it track one color, and if it starts moving the servos, then its probably not bad.

Also, try upading your Java VM, check java.sun.com for a new version

Try a different computer/cable/baud rate (Either jumper the camera, or change in it your OS, device manager->ports->yourport in windows)

It could be the computer can't handle communication at that speed on that port.. I personally have been using a usb->rs232 adapter and its working fine