Custom Blueprint K2Node Creation: Node doesn't show up

[Irvaxis_AcidFire]

Two weeks ago I opened this thread in the forums with additional information:

https://forums.unrealengine.com/showthread.php?65992-Making-a-Custom-Blueprint-K2Node-in-C-can-anybody-help-me-please

I still need help with this, as I have not been able to pinpoint my mistakes yet. Any help would still be very appreciated.