knetworkmanager crashes while updating the routing tables

hi ,
i am using opensuse 11.0 , when i update my network settings from yast manager , during the writing of network settings knetwork manager automatically crashes.due to this my routing table is not getting updated( i m using DHCP) so i m not able to browse the net.
i followed all the instruction what is given named Sticky.
the same problem i am facing.
can anyone help me how to solve this problem.