I have 2 houses and I go back and forth to one another.
1 house has WPAPersonal, and other has no security.
Everytime I come back to this house, the WPAPersonal one it always limits the connection, but I can plug in a Enthernet cable in and get internet fine. So I think it's the wireless renewal key.
The information is saved on my pc to connect to this network so it's not that I don't have the correct info.
I have the Linksys WRT300N
The renewal key is set to 3600, also usually I have to reset the router and turn security back on, then connect and it works. Then I leave for a week, and it doesn't works.