Adding Deck to exisitng Vassal Game

I have a Vassal Module (Le Grande Guerre). I am trying to add a map window with a deck to this module. I practiced on my own module until I figured out how to do it. But now I can’t seem to see the deck on the Le Grand Guerre module.

Do you have to do anything special to modify exisitng module?

The mask has images in both spots. And I tried making the piece and both mask options the same exisitng .bmp

I would attach it but it about 14mb

I tried adding a deck to another Vassal Module EiA, and was able to get it to work immediately.

Here is the link where I got the file off Boardgame Geek