I've got this weird "network login expired" problem since i got my wifi router, but after i created a wepkey password for the network it didn't appear anymore.
BUT, it has returned and i have no idea how to get rid of it this time...
And it's worser than ever, because i have to login every 2 min.
This isn't normal anymore
try mapping ports 6112-6119 through your router, It could be your router is blocking icmp (ping) requests, so when thier servers PING to see if your still there, they see you as not there, so they disconnect you...