Experiences troubles with USB PC Camera MIKOMI M6217?

I bought an USB PC Camera MIKOMI M6217 and I installed it or the software following the given instructions but the webcam still does not work,I even waited to plug in or input the webcam into my pc but the problem still remains.The error message is that this pc does not acknowledge this component.it is not find in this pc.I don't know what it is wrong with it.because I already installed more than 4 or 5 webcam but the problem remains,despite I changed the brand.labtec,etc...any help will be welcome and thanks.

CHICBILL
July 2007