remote start 30 second and shutdown

I intalled remote starter commando 5005 on Toyota Camry CE 2000, 4 cylinder

Tach wire I hook up is black wire on gray connector which connect to spak plug wire ( Teter ligh on when running only, not solid light flashingn with light tester when engine running). Remote try to start but can't start. I changed hook up Tach wire to BLACK/ org on the same gray connect to coil (where park plug wire will hook up to) show 12 when Igniton or Run. Then  may remote starter start engine ok. After a night, I use my remote to start engine, engine start about 30 seccond then shut off, Remote LCD show engine running but engine did shut off after 30 seccond running.

May some one help me out? What is exactly Tach wire for this car. I think I may not hook up not right Tach wire.

Thank you

Don