A short summary first :
Using the instructions in :http://pptpclient.sourceforge.net/howto-suse-92.phtml
I managed to connect with VPN!!!
However there is an error , but VPN seems to work.
ERROR: When I type 'pptpconfig' to start the program the followeing error appears:
# /home/fm/.kde/share/config/gtkrc:37: error: unexpected identifier `gtk-alternative-button-order', expected keyword - e.g. `style'
Does anyone know what is this error and how important it is??