Page 1 of region hack for philips dvd710

I followed the hack for philips 750 as advised. i bought a oneforall 6
remote control. set it up for a philips dvd, pressed magic button followed by code 085. put in 222 222 005 255 and then play button.
turned power off. i then played a region 1 dvd and yes it did play, but in black and white. i dont think i have done anything wrong as i tried
the same thing on my friends philips dvd player and his now plays the same region 1 disc in colour.
why does mine play in black and white?