Copy one of the existent FPE files....from a static entity.
Make some edits.
Make sure you put everything correctly in it.
Delete the DBO (always delete them after a test if it didnt worked)
Copy the FPE to a new folder test it again!
(FPSC always reads the DBO if you remain the FPE in the same folder after testing)
Thats basically it....for textures always try to use DDS they work better than TGA in X10.
And in my opinion DDS is better cause they are lower in MB's
Normally when using Normal-Maps you have to do this:
texture-name_D.DDS
texture-name_S.DDS
texture-name_N.DDS
But when you dont use Normal-Maps than forget the _D behind the texture's name.
Cause sometimes it seems it can cause some trouble.