Cookie,
I had the same problem u did, couldn't switch weapons, give squad orders, etc!, so I went out and bought the cheapest wheel mouse I could find (Kensington #19420, $9.99), and plugged it in. Now everything works ok, but I can't move or shoot worth a ****!. I have been using a Logitech #T-BC-21 Marble Mouse for about 3 years now. Just for giggles, I plugged my Logitech back in also, and was pleasantly surprised to be able to use both mouses without any conflict in or out of the game. I use the Logitech for everything but weapons changes, and squad orders. Hope this helps somebody else out there!
Sparkinator
ASUS P4P800-VM
Intel P4 3.2 HT
NVidia GeForce 7800 GS OC 8x AGP 256MB DDR3
4GB OCZ Ultra High Performance 3200/400MHZ RAM
ANTEC Smart Power 2.0 500watt PS
Logitech T-BC21 Marble Mouse
Kensington 19420 Wheel Mouse