My Trackpad or USB mouse will not work

Hey,
I'm running a power book G4 on version 10.3.11.
I started to notice erratic behavior with my track pad. It wasn't clicking on anything I was trying to select. Then all of a sudden it completely went. I can move the curser around the page fine but when I try and click on something nothing happens. It's like I am not clicking on the track pad at all.
I'm pretty sure it's not the track pad as the exact same behavior happens when I use a USB mouse.
I've also run a Hardware test and nothing has come back as being faulty.
Can anyone tell me what this could be? Maybe I need to update my operating system? Or there is something wrong with the board that actually reads the ram in my power book?

http://discussions.apple.com/thread.jspa?messageID=8669772&#8669772
This issue came up for me over the weekend on December 20th.
Tried reset of trackpad with palm. - No improvement.
PMU reset - No improvement.
PRAM reset - No improvement.
Disassembly and cleaning - No improvement.
USB mouse and trackpad have same symptoms:
erratic jumpy mouse cursor and clicks not registering correctly.
Used Diskwarrior to repair "keys out of order" problem. - No improvement.
Noticed desktop wallpaper switching rapidly.
Took PB to Apple Store - Genius booted to his portable HD and problem not evident. Concluded software problem, not hardware. Tried to delete mouse prefs but couldn't find them.
Genius recommended "archive and install."
SOLUTION
"Archive and Install" from Tiger update disk. - Problem fixed.
Ran software update - used combined OSX update. - Problem still fixed.
Looks like my problem was a software glitch. Kudos to the Genius for good advice.

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