ALARM WON'T STOP!
 

this just started today...I locked my car and the alarm started going off about 30 seconds later...I had never heard my alarm before this!! when I got back to work, I locked it, and everything was fine. When I got home, I locked it again, and now the alarm will go off as soon as I lock the car. I tried locking it wiht my other set of key (s) but it goes off either 30 sec. after I lock it, or immediately. I called the dealership and they only suggested I check the doors and trunk to make sure they were closed properly...didn't solve the problem.

Any suggestions would be appreciated!! I don't want to have to leave my car unlocked over night!!

Thanks :)