94 deville wont turn over, i think my alarm is in theft mode

I have a remote starter on my 94 Caddy deville, well theyesterday i started it without the key and it started and was running fine. I was cleaning the inside of the car with it running and when i accidentally turned on the air the car just shut down and wouldnt turn back over. it wont do anything even with the key, the dash lights come on but wont turn over, and the radio has no power either,thats wierd. I know that the car comes with a anti theft security system on it and mybe somehow it armed itself, but the alarm i had put on it six years ago has engine kill to.Which one is preventing me from starting? And how do you reset it? I tried everything, brought new battery,checked all fuses, locked and unlocked door with the key, still nothing. Is their a button i need to push to reset? where is it? Do you think the security system is even the problem? please help.