RCQC2 - Quadcopter pairing issue

Hello,
Excuse me for my bad english. I just finished mounting the quadcopter and the receiver, But after doing what the instructions said, the quadcopter and the transmitter doesn’t seem to pair.
The quadcopter’s leds keep blinking and the transmitter just makes one bip and then nothing happens,
The batteries on the transmitter are new, and the quadcopter’s battery is full too.
I double checked the polarities and the soldering but see nothing wrong.
Is there a way to make a reset of the transmitter or test the eficiency of the tranceiver?
Thanks a lot for some answers, my kid is waiting to fly his quadcopter he had for xmas…

Underdriver

is the throttle stick completely down?

Hello, yes the throttle (left joystick) is down. But nothing happens. Just one bip and nothing.

I have the exact same problem, did you received a fix or something? Im kinda sad, I build my drone but are not able to fly it.

Here are the just synchronisation instructions between quadcopter and remote control (transmitter).
Do these steps in the correct order. Otherwise the synchronisation will not complete.
See the steps below:

If it not help to pair the transmitter with quadcopter, you can send it back to local shop for repair.

Regards velleman support.