Forum:Gigaware Controller with PC ?

Folks, would be glad for any pointers on a technical issue. I bought Gigaware controller at Radio Shack (with USB plug not cordless). I've plugged it into my Sony Vaio laptop and followed the (minimal) instructions fm Gigaware. The computer picked up the device, and allowed me to calibrate it as the maker suggested. But I can't get past that point. When I plug in the controller, the computer doesn't switch to it, like an external mouse. The game itself doesn't seem top have a choice for selecting an external controller on its Options menu. How to I get this thing to work with MW2 ? Thanks for any help EC