KakuteF4v2 and M8Q-5883

I have a problem with arducopter 3.6.10 (I tried 3.6.9 & 3.6.2 too) and Matek M8Q-5883.)
GPS 1: detected as u-blox at 115200 baud appears again and again and gps status in Mission Planner is changing from no fix to no gps then no fix no gps …
But when I’am using compiled ArduCopter V3.7.0-dev gps is working good but RC7 and RC8 opt in MP is grey.
What can be a source of my problem?

Use 3.7-dev and configure the RCx options in the Full parameter list.

Thanks Dave.
I updated MP and set rc7&8. Looks better.