i was thinking about ps2 there, for ps 3 ;
Goto settings
Goto network settings
Goto network connection, select enable
Goto Internet connection settings just below internet connection-
Push yes when it says you may be disconnected
Select wired or wireless
For wireless use scan or enter manually
Follow on screen instructions.
Once that is set up return to main menu and go to network near the right
You may have to reset your router so that it will recognize your ps3 . (if no reset then unplugg router and power it back on.