Hey there, i need some help with my GV system.. when i try to execute GV800main system.. this message("can't find usb key, please contact with your agent") suddenly pops up and i cant do anything else. i tried reinstall drivers and GVsystem (main system, remote viewer..etc) . I contact the person who sold it to me, but he tells i don't need a dongle, what do ya think the problem could be?

Televison & Video - Geovision - GV - GV-800-16 Video Capture