New (unofficial) part not recognized by MLCad

[Jaco van der Molen]

I still have 3.30 somewhere, but I am sure I open the exe of 3.40.
There is only one MLCad.ini on my system and that is in the same folder as the 3.40 executable.

But it is getting more stranger now: I have opened my model in LDView and now MLCad does recognize the part too!

However, if I start MLCad 3.30 it cannot find the part.
It is still in the official parts folder. In any case I thought putting a part file in there would mean LDraw could find it even if it is not in the parts.lst file.