Binding Transmitter Fs- TH9X

Hi Im Having Problems With My 3DR Iris+ Cant Seem To Bind It To The Drone Everything Is Good GPS Locks On Battery is Fully Charged Batteries on Transmitter Are New Just Cant Seem To link both transmitter and Drone With Each Other i think maybe someone messed with the Remote Somehow And Changed some Of The Settings i dont know can someone plz help me ive only flown it 3 hours max first time i crashed landed bcuz a sensor on the motor was bad so i had to send back in and the secong time i flew it and crashed it on a pillar on the coronado bridge and ever since i havent been able to fly this thing thank u it would b much appreciated