Auto Start Chevy Prizm Lsi 1998

I'm installing a remote start for chevy prizm 1998, I hooked up all of the wire except the tach wire, because i couldn't find it. after that I'm thinking of trying the keyless entry, so i hooked up the brain and the sensor too.

what happen was when i push the door lock key from remote, the siren crips once, the brain produce some sound, and i heard litlle sound from the driver's door panel, too. But the door didn't lock, including others door. And the parking light didn't blink also. when i push the unlock key from remote, nothing happened too, just the siren crips twice, and litlle sound from the brain.

one more think is, when i try to go inside programming mode, the led suppose to blink 3 times if the remote works, but it didn't blink at all. I try couple times, same thing happened. but like i said before, when i push lock or unlock key from remote, the sirene will crips. so, i think the remote works.

This car has a little problem with the door before I install the system. This car have 2 central lock, one at the driver's side and another one at the passenger side. When I open the door using key, it only open the driver's door, others door still keep locked, but when I open the door from passenger side with key, all the doors will open. And both the driver side and passenger side central look switch at the door panel work fine, I mean when i push lock position all doors will lock, and if i push unlock position all door will unlock.

What do you guys think wrong with this? I tried to find the wiring diagram from here and it said that the lock and unlock signal with (-) sign, so I assumed that this is the negative system and I hooked up the othe wire from the brain to positive +12V wire, is that right?

Please help, I don't know what to do anymore, this is my first time installing remote start.

thank you very much

dan