Car Alarms: Remote Starter, auto starter, s programming

Question
I recently had to replace my car battery.  Since then my auto start does not work.  I can lock/unlock the doors with the remote but that's it.  This feature was installed after market.  I have no idea what kind of auto starter it is.  Tried key on/off, hood switch %26 valet switch and some other ideas that I got off the Internet but non seem to be working.  Any suggestions?

Answer
Not knowing the car or truck and year is problematic, but it sounds
as if the bypass kit used to get around the ignition immobilizer
for remote starting has lost it's programming.

I suggest you visit the installer again and have that attended to.

Best I can offer without more on it.

ALARMTEK