Problem with styles

I have a problem with mkgmap styles. I made a style myself to display cycle node networks. I put my style in the folder \resources\styles\ and I used

java -jar mkgmap.jar --style=fietskrt --input-file=map.osm

Unfortunately, it seems to use the default style. If I use --list-styles it also don’t list my style. And if I want to use the noname style, with the same command, it also uses the default style. I also can delete the “noname” folder without problems and it creates maps, even if I use --style=noname (It uses the default style too, then.)
What am I doing wrong?