Please Help Me

I changed my starter in my 1996 Sunfire and now the anti theft light is on and wont go off,and the car wont start either but will turn over. Its the only car i have so please help me.

turn your key on without trying to start it and wait about ten minutes and watch for the anti-theft light to shut off when it does turn the ignition off and then restart it. it should start right up. if not you may have to unhook the battery for a few minutes and hope it resets. if it has a passlock like i think it may then what i told you above should work. just watch for the light to shut off then turn ignition off and then restart

Also be sure you got all the wires back on the B+ terminal on the starter, may have no power going to something. Some cars have several wires coming off the starter B+, so take a look around.