I wonder if you have tried it the way mailman81 says:

-Turn tranmitter on (safety measure).

-Connect lipo to esc.

-Press and hold SET button, then switch on the esc while still pressing down the set button. Keep holding down the set button for 2 seconds and release. Do this (resetting procedure) 3 times, just to be sure you are actually resetting it.

So FIRST press and hold SET button. Only that will work.

Without resetting the buttons never work.