Alarm system going off

My 2000 jeep grand Cherokee alarm goes off every time I open the drivers door. I cannot turn my key any way but to the unlock position with door. I have to get in put key in ignition and shut the door then turn key to on position to shut off alarm. I’ve got a new battery etc. I’ve done some many many things too many to list but wondering if anybody has ideas I have not tried? Please n thank you