I want to thank everyone who responded to my post. I took Alexair's advise on binding issues that I might have. And yes I did have a binding issue with my overhead panel where I assigned my starter knob and start switches in MFS2020 to it. I removed the assignments in Mfs2020, and the starting process worked in the 310 immediately. So there is binding issue with this plane when assigning the same operations in other peripherals to fs2020. I use Button Box Interface from Leo Bodnar on my panels, and haven't had incompatibly issues until this plane. Maybe I will find a solution to it some day.