USB Wireless adapter

I am trying to install a wireless 802.11g USB adapter.
The system sees it is in the port and lists it in the
device manager, but with a yellow circled exclamation
point over it's icon. It won't load the driver even after
repeated attempts. It tells me it is a Code 2 error and I
can't find what that means anywhere. I have spoken to all
manufacturers involed and the device works when they test
it on a similar OS etc.

Any Help Is Greatly Appreciated...Thanks