Connecting 915mhz 500mw telemetry radio to apm 2.8

hi there
I need help in attaching the telemetry radios to the ground and air module
when I connect them its flashing green in the ground module and solid red in the air module and I cant connect the apm to the mission planner via those radios

please help me out

Have you tried to follow the guide on the ardupilot wiki? My suggestion would be to upgrade firmware on each one, and make sure they both have the same ID so they can talk to eachother.