Car Alarms: 2005 Honda Accord, honda accord car, remote keyless entry

Question
Car alarm goes off when I hit unlock on the remote keyless entry...tried first with spare key and again with my main key both times it keeps going off and wont let me start the car.

Answer
Please be more descriptive if possible.

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