Ive just put a film DVD disc in to show my mate something,and its come up

"The parental level of the player has been set"

If i click no,it tells me to fook off,but if i click yes,it asks me for a code?!!??!?

WTF???????????????????/

Its NEVER odne this beofre,and ive watched this disc on my PS2 loads?!?

Is there a default code???

Pete...