Connection problem with mission planner

I m Tijul from Bangladesh. I bought an APM2.6, 3 weeks ago. It was fine & worked properly. but problem is, from last night I couldn’t connect my APM with the mission planner. I was trying to connect Hobbywing ESC 25*4 with APM digital I/O. after a moment, my connection was reset. and after that, I was unable to reconnect my APM with mission planner. sometimes later the mission planner was connect with APM but couldn’t found some RC parameter. I m uploading a screenshot… pls help me, give me a solution. TIA