97 expedition factory disarm

Just intalled a scytek 5100 remote start the lock unlock work fine when i go to start it with remote it cranks but doesn't start  the security light flashes. i coudn't find the factory disarm wire it's suppose to be d GREEN/ purple in drivers kick panel but can't find it had same problem with a mustang couldn't find it but the remote start worked fine. One more thing i used a key from ebay so i don't have to use one of mine does that make any difference, and coudn't fine the tack wire eather but i know that's not the problem b/c while the car was trying to start from remote i put my key in the ignition and tryed to start it but it only cranks. El Paisa

No i didn't program the key from ebay how would i do that i just put it in the bypass module and there what would i have to do? El Paisa