kvpnc does not work anymore DNS server?

Hi I used kvpnc without problems in Kubuntu 10.04+trinity. But now either in Ubuntu 14.04+trinity or Kubuntu14.04+trinity I run into a serious problem. The kvpnc connects to the VPN server using the chisco backend. Everything works, connection is established, but then Any ping does not give a result for example ping www.economist.com Just hangs. But ping 192.230.82.108 Gives a result so it seems a strange DNS problem When I have no connection then ping www.economist.com just would give unknown host Be it as it may, I cannot use the connection this way. The browser does not fin Once I close the vpn tunnel everything works again fine. I googled but did not find any result. Any help on this issue is highly appreciated since VPN is very important to me. Uwe Brauer