Karma is not increasing for weeks...

well, the title says it! :( I don't know if it has been a week or 2 weeks but I know that my Karma isn't increasing! my friend's Karma is increasing/decreasing yet mine stays at 81.40, sometimes falls and not increasing anymore... :( please help me! I need my lost Karma back! I've been plurking for a long time now... I don't want to quit just because of the Karma system... please HELP the A-Team!