help displays not translated

Hello, I've done recently translation of several packages to Polish. Usually all messages. After using msgfmt and installing .mo files on my Fedora Core 1 distribution I have found that some messages are showing up not translated, even if they were traslated in .po file. For example in redhat-config-mouse, the help screen is displayed in English, instead of Polish. I have done translation using emacs, by editing a copy of .pot file. There were no error messages during generation of .mo file. Can somebody tell me what possibly is wrong? Andrzej