I can’t tell why it is that the Camera Control script doesn’t work for some systems, but I presume it is some difference in the WIA configuration or settings of that camera or PC. If you’d like me to try to fix it for your system then I’ll need some more details.
Use this WIA test program, from http://www.milika.net/, to get the details of your WIA connection and send them to me. You can leave them as a comment here or email them to me at raymond -at- this domain name (diyphotobits.com).
ps. note that it is a RAR, not a ZIP.