This is a known problem (at least already reported) and we still miss a
maintainer for kformula, so nothing has been done about it, AFAIK.
But :

> My wish is to start koffice :-))
You don't need kformula to start koffice.

-- 
David FAURE
david.faure@insa-lyon.fr, faure@kde.org
http://www.insa-lyon.fr/People/AEDI/dfaure/index.html 
KDE, Making The Future of Computing Available Today