touch pad and mouse are not working


Hi to all Mac Users.I'm new user , just get a powerbook g4 500 mhz , 256 ram
as a gift .. and never before i have been working on MAC OS . It came with
MAC OS 10.2.3 and i tried to upgrade on 10.2.8 because that was the version that automaticly show when i press software update. After the upgrade finished
the system reboot and when the new operating system version started my mouse was not working. i unpluged it and restarted the computer .... when i try to browse with my touch pad he doesnt work also.... pls hlp me... (sorry for my bad english)

10x for support in advance.