Just hit the update button in pinger - pinger is at version 5.2 now I think, at least there was an update for me.
Or manual instructions:
You have to update the pinger options-> game settings to reflect the new urls:
GLB File Link:
http://nw4.novaworld.net/bhd_6.glb?a=1
Play Stats Link:
http://novaworld.net/bhdqqstart6.htm
Play public Link:
http://nw4.novaworld.net/bhd_6_lobby.htm?a=1
Join Link:
http://nw4.novaworld.net/bhd_6_join.joi?RID=
Then pinger will work (at least for me, until I made those changes pinger just complained about not being able to get the server list).
I would try updating pinger first - they have enabled express login now.