Disable chmask and TxPower

I have two gateways,in two area
1.work on 470.3-471.7
2.work on 472.3-473.7

There is one problem:
When enable channels is 0-7 and 11-18,node will lost packet in area 1 or 2 after received ADR->chmask

How can i do ?

Then How can i set node Tx with max power.it always be reduced by ADR->txPower