thanks very much for your reply.
The software could support up to 24ch. I installed 4 cctv cameras, it worked well, then I installed 4cctv cameras and 2 usb cameras, it worked well too. But when i added another usb camera, there was no image of the third usb camera.
this time, i didn't use any cctv camera, and i removed the card from my pc. I plugged in 3 usb camera,
i lcould only get 2 image.
i don't know why i could not get the third usb camera image.
anybody have some experience?
thanks