[10.1Rc2] yast2 problem

Hi, I have a stupid problem with yast. Yesterday I tried an update from 10.1 rc1 to rc2. But now the most parts of yast don't work. For example: Command: /sbin/yast2 sw_single & No such client module sw_single Command: /sbin/yast2 inst_source & No such client module inst_source Command: /sbin/yast2 online_update_setup & No such client module online_update_setup [...] I downloaded older yast packages, installed with "rpm -U --force", run SuSEconfig but it doesn't work :-( I have got no idea how to solve this situation :-( Ciao Jens Weiße