Good day

I am trying to bind my multiprotocol jumper t12 with frsky xm+ receiver. I follow steps shown in this video:

How to bind Frsky RX to Jumper T12 (7 min 57 sec)

Everything seems to go fine, i can successfully reach the first step in binding protocol (video 1:56 solid green & flashing red). After that binding should be completed, only switch receiver off then switch on and green light!!!!!! (video 2:14) but in my case i get flashing red light instead The big question is why? Is like if previous step were missed.

I would appreciate any help. I have already flashed my xm+ and updated last firmware in the trasmitter. I do not know what else to do apart from throw away both, trasmitter & receiver. From what i have seen in the net this xm+ is the worst receiver ever. I do not know what element is faulty (in case any is faulty)
if transmitter or receiver.
Please if someone has any idea i will be grateful.

problem was transmitter batteries. I was using rechargeable batteries and tried with alcaline. Then the f... ing green light.