Mandrake sets OpenOffice up in a non-standard way. The following may work but I promise nothing.
Use the Control Centre to uninstall OpenOffice.
and download the latest version. Don't worry about it being a tar.gz, the program is self contained and there are no dependencies. I use the 1.1beta and it's fine.
Do the "network" install (even if you have just a standalone computer) as root in a terminal. Then as yourself, do the user install (go to the main OOo folder in a File Manager where the network install was done, something like /usr/local/OpenOfficex.xx and run the setup icon). Install the one which takes up the lower disk space, this just "connects" you as a user to the install you made earlier.
This is the way that OOo is designed to work, and should therefore run better.
No guarantees, mind! Also OOo won't be on your menus. If you are using KDE there is a simple solution: install "oooqs" using Mandrake Control Centre. This will put an icon in your system tray which enables you to launch all OOo functions.