Car Alarms: Set off Immobilizing alarm by accident..can not start truck!!, alarmtek, dash area

Question
QUESTION: Bought our truck used and was not given code for immobilizer.  While cleaning the truck today accidentally armed it and now can not get the truck to start.  The horn beeps once and that's it..nothing else.  How do I disable the alarm totally??

ANSWER: 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

---------- FOLLOW-UP ----------

QUESTION: It is after market as Dodge Dakota's do not have a factory immobilizer.

Answer
Alright, try this...

put the key in the ignition,
and turn forward all the way just before cranking.
Then within 5 seconds, locate, press and hold in
the valet/overide button, found under the
dash area, (push button, spring loaded)
until the installed LED (the blinking light)
in your dash area goes on solid,
and the siren chirps once.

(Your valet switch might be the toggle
(on/off) type. in this case, key on,
flip switch in opposite direction,
then turn the key off.)

This should reset the alarm.

At this point, the only thing working would
be the keyless entry from the alarm,
if it came equipped that way.

Just Repeat these steps to place it
back to usable armed mode.
You may get 2 chirps, confirming it,
and the lights may flash twice as well.

That should do it.

A.