Can't create new submenu with kmenuedit

Hello list, I have problems in generating a new menu entry with kmenuedit. When I entry a new submenu, and afterwards to this submenu new elements, everything seems to work fine. I can see the new submenu, and I can also save the new configguration. However, when I leave and start kmenuedit again, my new submenu is missing, nothing has changed. I habe installed kde 3.00, and I am running Fedora. Alexander