Impossible change the unique code of KB5059 kit

Hello there is a problem with the KB5059 kit, I do not know change the code, I made several attempts as shown in the procedure provided with the kit to change the unique code but nothing to do not change the code. Too bad because if it were possible that little kit would be perfect …
He has anyone solved this problem?
Thank you

There is no problem with the kit.
Most likely you made a small mistake.

Erase all codes of the receiver (see manual for how-to instructions)
Change code of transmitter (see manual for how-to instructions). Make sure that you did not mount any jumpers on the solderside.
Learn transmitter to receiver.