Playstation network error.

okay so i try to get on cod 5 today, and it says Unable to connect to Authentication Service (Error 34). And all my zombie maps are disabled, button layout, sensitivity is changed. I cant even go to the story, it says they are locked, except the first one, Does this mean i have to start over? Are my map packs disabled now? And now i try to sign into playstation network, and it says it undergoing maitnence. How long will this take? and will everything go back to normal that i described?

I would have thought they would have been down for a few hours and everything would return to normal. I guess I am lucky cause at the moment I have got a game on COD4 with ease

down for me too, tried some minutes ago... maybe its a update or something like that...

Could be just there doing some maintenance on the PSN network.