PS1 / S-VIDEO / BLACK & WHITE PAL GAMES

Hi guys. I have American PS1 (7501) and a smart cartridge (Game Shark with auto stop disc) for running imported games. There are no problems with Japanese games, but European games with a black and white image. Official Sony S-Video cable will solve this problem? Or need ONLY RGB Scart cable?
PS: my tv is LED Samsung 32.
Thanx!!!=)