On the XMB, go to the left where all the settings options are. Go down to Security Settings and make sure your Parental Control is set to Level 9, and the other things are turned off if you don't want to deal with them.
Edit: I guess 9 isn't the highest. Turn it off too. Mine was 9 by default I think, and it goes 1-11-off. 1 being the most restrictive, 11 being the least besides off.