98 chrysler concorde alram problem

Hello I recently got a 98 concorde couple months back and alarm never game me a problem now everytime I open the doors it goes off and I do not have the remote for it , also car wont start now it comes on and goes off would really apperciate if any one can help me with this problem.

If you are hitting the lock button on the door, before you shut it, then it is probably the factory alarm. The only ways around that would be to purchase a factory tx, but i would recommend buying a aftermarket system, and if hooked up properly would disarm the factory system on unlock. As init, i'm confused what you mean when you say "comes on and goes off."