Good afternoon, I hope I can help you.
Basically you cant disable the immobiliser unless you remove the ecu and send it away to a specialist to have the circuit bypassed.
Bear in mind also that if you do remove the immobiliser you will also have to tell your insurance company as the vehicle will then be easier to steal.
My name is XXXXX XXXXX if you need further help, just ask.
Hate being the bearer of bad news but sometimes thats all we can do.