Problems with PS3 Black Ops split screen?

I bought COD Black Ops and I only have dial up. To get the patch so I could add bots to split screen I had taken my system to my buddy (who has wireless) and downloaded the update. Now back at home whenever I try to go to split screen by using local (not LAN) and tells you to hit "x" with the other controller it go to black screen and tells you something like "cannot find LAN or internet". I want to play spitscreen at home with my daughter and it will not allow me to. Thanks for any help>