1994 camry remote starter problems

I have a customer w/ 1994 Camry. There is an aftermarket security system add on that whenever you put the key in to start the car, you have to turn on you headlight high beam or hold it as a high beam flash in order to start the car. I tried to put the remote starter with keyless entry model ez-2500 commando system. Everything works but not the starter. I don't know how to by pass this aftermarket security or remove complete off the vehicle in order to remote start the car. Please help me out. Thank you

I don't know if this is the security alarm system add on or just some relays to make this function to disable normal start. I am very positive to what you told me I will give it a try to see if it works. Thank you. If not, please tell me an alternative ways to remove it. Thank you