Jeep won't start !! Help !!

I need help! My Jeep won't start! It beeped and then proceeded to die! Has a good batteryand plenty of fuel ... will keep trying to start, but just doesn't ... put in new coil and crank sensor ... that's not it, either. Will kick over with a shot of either, but not on it's own. Any ideas???

Sounds like it might be an alarm / immobiliser giving you the grief

or could just be a fuse!

I think it probably could be in the theft deterent ignition. My Jeep does not have this, but my 94' Camaro does. I had to change the lock cylinder and key on the Camaro because the wire going to the securitry system broke right at the lock cylinder. Does your even have the security feature on it? What year model is your Jeep?