The "Sony Games" forum, which includes Retro Game Reviews, has been archived and is now read-only. You cannot post here or create a new thread or review on this forum.
NTSC discs will play back in black and white UNLESS you have an RGB SCART lead - not IF you have one. Doh!
Most likely problem is that it's Region 0 (i.e. all-region) and is in NTSC format.
Is your PS2 connected via SCART? If so, then it is likely that your TV does not support NTSC playback.
Playback of an NTSC DVD on a TV which doesn't support NTSC will always result in a black-and-white picture; it's not a problem with your PS2.