dei 553t

hey all, i had a couple questions. first thing is i have a dei hornet 553t installed on my durango. its been on it for like 5 yrs or so now. when i remote start it(which works great), i cant unlock the doors with the remote. the only way is to unlock it with the key and as soon as i crack open door, the alarm blares and i have a heck of a time getting it to stop. anyways, anyone have any ideas? i have replaced the battery in the remote so that cant be it. i also have replaced the antenna twice. the other thing, i have a brand new dei hornet 563t sitting in my closet and was wondering if anyone new if it would be a direct plug and play so to speak instead of the 553t? i just didnt want to have to run all those wires. i figured if it was the main brain giving me fits, id just swap them out since theyre all but the same from what i can tell. can anyone confirm this?

just an update: the brain units are not interchangable.....

Are you able to lock/unlock the doors when the truck isn't remote started??

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DTS Performance
St Petersburg, FL

yea sorry if i forgot to mention that. yes the lock/unlock works great when its not remote started. it only happens after i remote start the vehicle....i just pulled the brain out today thinking maybe it would reset something....which i doubt, just a thought. will find out tomorrow when i try it out again. dont need neighbors getting ticked at my blaring alarm lol