Problems with Spektrum DX3
 

Hey guys,

I just bought a second hand DX3 handset and receiver. It works fine for Channel 2 and 1, but i can't seem to work out how the heck i'm supposed to activate my third channel. I want to be able to flip a switch and activate a servo with it, or at least even get a servo to work with the other one through the receiver. i read the manual and for some reason it doesn't do what I want to do i.e. if i hold the two top buttons down, it will only go into the model selection. not data reset, not channel 3 function.

what's going on? what do i do?