I tried getting my PS3 online today. Hooked it up through in ethernet cable, signed up to the playstation network. Put COD4 in to play. When to multiplayer online, then it kicked me off saying I need to sign up to Playstation network. I went back, and it still says I'm signed in. I just kept repeating, hoping something would change, then it didn't kick me off. It said it was downloading game settings...for 2 hours. Finally, I went back to the menu, checked the connectivity, everything's fine, and now it's back to kicking me off, saying I need to connect to the Playstation Network.
Can I get any help? What am I doing wrong?