Plugin not loading -Wireshark 2.9

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Hello, I had a working plugin back on version 2.2; it was compiled under VS2015\Win7. Recently I was attempting to adjust my plugin for the latest Wireshark (2.9) and Win10. So I've downloaded the latest code and built the 64bit libs, and then I had my plugin compiled and linked with those libs. (Had to do minor changes, and relocate my plugin to the plugins/2.9/epan folder for some reason) Compilation went OK, no warnings, I've also placed a break point under proto_register_protocol() call, just to see that Wireshark is loading my plugin, and indeed Wireshark stopped its execution at my break point. However I could not point to my plugin in the User DLT table, I got a red error "dissector not found".

I really don't know how to debug this, any clue?

/* Partial code */

    ProtoEssence = proto_register_protocol("My Protocol",  "Protocol",   "protocol" );
    proto_register_field_array(ProtoEssence, pInfo->pRegInfo, pInfo->RegItemsCount);
    proto_register_subtree_array(ett, array_length(ett));
    register_dissector("protocol", dissect_ecpo1, ProtoEssence);

I can actually see my plugin version and name under Help -> About -> Plugins however, creating User 0 entry resulting in Wireshark not recognizing 'protocol' as registered dissector though everything looks right.

10x Eitan