I am using the C2MT4Connector EA. When I attached the EA, I can see that the _CorDllMain is not loaded properly. See picture below. I have reinstalled the .NET; however, I am still having the same issue.
I don't know why but the red-color doesn't mean it isn't loaded! For my dlls, it always seem red but they work. Check mql expert/log for the issues it encountering.