I am fairly new to flying I have an electric typhoon 3d that I can somewhat fly but I am putting together my first ARF by myself is a Seagul PC-9. I just purchased a new used radio and servos an Airtronics VG600 I installed the servos in the wings and did a test on them prior to putting all of the other electronics into the plane. I am only able to get one aileron at a time to work. The plane has a servo for each aileron and I am only able to get one at a time to work, the only slot that it works in is the #2 slot in my receiver. Is there a setting I need to use to get both servos to work or could the receiver be broken?

Thank You for any help you can give,
Dave