My Sequoia won't start. The security system may be enabled. how do I disable it?

What is your question?

2 months ago I had an autostart put in it. since then I have had to jump it twice. went back to the shop and was told that the lights had to be in the off position not auto. changed that. yesterday it just wouldn't start. put in a new battery. dash lights are on. doesn't even try to start. auto start does not start it either. some say I am locked out, could be alternator...ideas??