Whats your hardware specs?
I'm running an old Dell poweredge 2650 server, It needed a supported USB card for me to use my mouse.
I'm no linux guru yet, but you may want to try lspci command , as it useful to see if your system has recognised your USB Hosts.
if your running an old PS/2 or serial mouse (circler shaped connections), then I can't see whats wrong...
if your running a laptop, it most probably is using PS/2 - still try and find out if your system recognizes it though.
use "Man" to find out how to use lspci (ie type "man lspci").
sorry I can't help you anymore.