I have found the soloution for MY Prablem - for the records:
If you use the unit fileinfo there is a different between local using - eg. for the same file - and using for other files (exe,dll).
Local - only fileinfo in uses nesserary, no reader have to declared
Other files - you have to define the readers for the files you expected - in my enviroment winpeimagereader ( found in fpcsrc/packages/fcl-res/src)
The soloution for me is, i have to add winpeimagereader in the uses line.