com port timesout

I am using a windows 10 desktop an am trying to connect a mega 2560, the device manager shows that is the unit that is attached to the com port. Arduino show that is the board I am using and also shows the correct com port. But no natter what when I start Ground control and to th actions as soon as it connects it times out. Any help would be greatly appreciated since I have about 15 hours in trying to set this up.

Scottr:
But no natter what when I start Ground control and to th actions as soon as it connects it times out.

What does that mean?