1999 Dodge Avenger

I am having problems with my anti theft system. When i open my door and its unlocked in the beginning the alarm goes off is there something i can do? i lost my keypad so i cant turn it off that weay is there any way i can replace that?

You can remove the fuse that allows the anti-theft system to get power. You can go to your local Dodge dealer and ask about having a new keypad programmed for the vehicle.