if the timer option is OFF the alarm will NOT arm with the car running. when you arm it press and HOLD the remote button - it will arm and chirp. tampering with the vehicle will shut it down.
sounds like the actuator.( thing that works the lock mech on the drivers side.) if you are mechanical tear the door down and check that the rod is still attached or that is hasnt moved.
if not take it to a shop and pay them for it. should be $100 by the time all is done.
that is a 1.5-2yr old unit. if you have the reciept for it take it back for warranty. they started 2 yr warranties about the time that one was sold.
what EXACTLY do you mean by crap sound on cd?
depends. from that it would appear that the rod has slipped. other thing of course is a blown fuse onthe alarm- IF that is the case I would look at the wiring going to teh actuator BEFORE replacing the fuse.