APM 2.5 MissionPlanner 1.3.31 re-programm GPS LEA-6H

the GPS blue led is always flashing, want to re-program GPS receiver LEA-6H through MP and mav-serialpass by using u-center v 8.18. Using Dump Receiver diagnostic seems order transmit to GPS but no Answer : timeout receiving while query receiver done. Using GNSS / GNNS to file , packet and binary consol open , the tranfered order to GPS is visible that the … Timeout expired and failed due to timeout appears. Baud Rate 9660 is used.

Thanks for useful answers