it depends on your tv if it can play in 50 or 60 herz. Your tv simple doesn`t support 60 herz. If you have a pal ps2 and you want to play ntsc games you can download a converter on the net for each game.
www.megagames.com or you buy yourself a rgb cable. How do you know if you have a rgb cable. Simple. Look at the end of the cable which you`ll out into your tv. If that plug contains i belive 20 pins you got yourself a rgb cable.