alarm arming issue?
 

I have a 2002 chevy blazer 2 door ls 5-speed.today when we were getting out of the car i locked the door too quick (alarm armed as it should) so i quickly unlocked it so her slamming of the door wouldnt set the alarm off. Went to lock again and doors locked as normal but now the alarm will not arm nor will my little security light blink anymore, it stays on solid until i start the car. Please help!!!!