Blank video file

I just started using Camstudio, went through the tutorial videos, etc. and was able to come up with a video of good quality and small file size. I can view it on my computer perfectly by double clicking the file, but when I try to open it on another computer I only get a blank page!! I have video options to Microsoft video 1, audio 44.1 kHz, mono 16 bit. I have played around with the settings but I still cannot see the file on another computer.
HELP!!