Hi Tartenmuche,
Does your other maps load fine when you are in FMB, or is it only the WF ones ?
Have you deleted the old entries of the WF maps in your "all.ini", and changed them by the new ones ?
(Because if they are named differently in BAT-WAW, so the game will not be able to find them ! )
"Maps.properties" is not a problem : It simply rename the entries of "all.ini" by a name of your choice.
Usually, when you try to load a map unsuccesfully, there is an error message in the down left of the window.
What tell you this message ?
FMB or FMB unlocked ?
Do you renember step by step what you have done for the installation ?
Try to reconfigure your game like it was, see if all work fine, and redo the install of the new maps.
Often, a little error like a bad space in an entrie (for example) is fatal for the loading of a map !!!
I do had the case no longer than a few days ago when testing the maps before the publication.
"abcdef. tga" in place of "abcdef.tga" in the "map_load.ini", and the map don't load !!!
And it's the same in "static.ini", "all.ini", etc....