[SLE] Software management

Hi After installing Suse Linux 10.1 i installed a few extra packges from the dvd and yast2 software management worked fine. I then added a local mirror for updates as one was not added during install. I then ran an online update using yast2 and installed only 2 packages, libzypp and yast2online i think it was. After the online update and on rebooting my yast2 software management will not open when i click on the icon. I also try : "yast -i xmms No such client module sw_single Run 'yast2 -h' for help on usage" Any pointers please ? Mark