Did you ground the wire?
You need to ground the wire on the body side, not the wire that goes into the door.
Ok, so this has nothing to do with the alarm system then.
Maybe you just have a dead battery. Try a jump start and see if that helps.
Well if it won't turn over and there is no power it appears the battery is dead. So, I suggest you try a jump start and have that wire grounded that I told you about.
Let me know how it goes.