Ok , First of all tell me one thing , during installation of Linux DID U CHANGED THE DEFAULT KEYBOARD AND MOUSE LAYOUT???
If yes then make it default...by installing it again or use the method following(I am not sure wheather it will work)
Just try this
Boot your system in rescue mode from LinuX RED HAT 1st CD by typing command
#linux rescue
JUST follow the instructions there & At last giev command
#setup
After that choose keyboard and mouse options
& just make all default
reboot ur system again
May be it will work
Gaurav