Multiple webcam streaming problem - Audio/video stream recording forums

I have a Sony Vaio VGN-cr510E Laptop. I am using Webcamxp 5 (Pro) and the reason for that is I wanted to be able to watch multiple webcams at the same time. The webcams are gearhead plug n play 1.3 mp webcamsfor pc/mac model wc740i. I am trying to setup 3 gearhead cams, along with the camera that came with the laptop. I can get 2 gearheads and the laptop camera to work at the same time but when I try the 3rd gearhead the screen goes blue and says a problem has been detected and windows has been shut down to prevent damage to my computer, page_fault_in_nonpaged_area, etc. I am not computer literate at all so any suggestions on what I need to do would be very much appreciated. Thank you.