i have 2 sc's now.. just got the newer one a couple days ago (94 sc3).. and here's my problem...

i have the factory alarm which only works with the key.. my unlock button works on both sides, but the lock button doesn't. i was wondering how this can be fixed? whats wrong? and can i just get an aftermarket alarm system and have the remote control it w/o the locking button work on the car itself?? any help would be great.. thanx..