Car Alarms: car alarm, 2001 isuzu trooper, alarmtek

Question
I have a 2001 isuzu trooper and I believe it came with a factory alarm system which means i cannot take it out. My only key pad to the alarm system was damaged and no longer works. Everytime i open the door the alarm sets and i cannot get it to stop. If I order a new key pad and try to set it will it allow me to set it even when the alarm is going off or what should I do?

Answer
Please be more descriptive if possible.

"GOING OFF?"

I need to determine whether it's a factory alarm
issue or, if it's an aftermarket system you are
dealing with.

Is it: Headlights flashing, car horn honking
and a worded SECURITY" light in the dash flashing?
(doubtfull since none of the notes show this
car as having a factory alarm system)=FACTORY

Or,

is it: flashing parking lights,
an LED in the dash area, and a siren
going off?= AFTER MARKET

Let me know more on this to better
advise you on a course of action
to take.

Best Regards,

Robert Martin
CEO/ALARMTEK
CARALARMMAN.com