MY03 STI Brant Alarm

so here goes; let car sit for awhile maybe a month but gave her regular starts and runs however battery shat itself.

had a spare battery from a 4WD and could jump it no problems; However bought a new battery today changed it out NOW IT WON"T START.

normally enter pin key pad changes from all numbers illuminated pump primes boost controller powers up and off i go.

I enter my pin but doesn't deactivate the immobiliser no priming of pumps etc.

engine turns over no problems just the other stuff.

Please help before I Beat this Bitch with something heavy.