.Net wrapper to COM server with events problem in NAV 2017

Hi everyone. I need to use old COM server (exe application) on NST side. I wrote .net class wrapper to this COM server. Calling COM server method is OK. But when COM server raise event to my wrapper and wrapper send this event to NAV, the NAV is freeze and event code in NAV is not performed. I logged, that problem is in calling event to NAV. When I wrote simple WinForm Application, which use my .net class as wrapper, I receive the event sucessfully.
Can someone help me? I try this in NAV 2017.
Thanks for the Help