install kde from ftp-server?

Hi all! I've upgraded from SuSE 9.0 to 9.1 using an ftp-server. How can I upgrade from KDE 3.2 to 3.3 using the same ftp-server from within YaST? I've tried to change the installation source to the ftp-server but YaST does not accept the server (or maybe it is the directory on the server that is wrong, I've tried many different choices). I get the message "ERROR(Inst Src:E_noinstsrc_on_media)". Does anyone know what I have to do? If it is not possible to do what I want, could someone please tell me what is the most convenient way to keep an up to date kde installation in SuSE? Ciao, Johan