You have to set the “DISPLAYMANAGER_AUTOLOGIN” variable to your username in the file /etc/sysconfig/displaymanager. Either use a texteditor (“kdesu kwrite” f.e.) or YaST->System->“/etc/sysconfig Editor” for that.
it is a suse bug or it is somethink wrong? (my friend on anolther pc try same but have the same resultat)
It is a SUSE bug. Well, actually it’s by design. It was done that way, I guess, to have a standard method regardless which desktop you use (KDE, GNOME, XFCE, …)