Outputted footage showing in B&W not Colour

Hello,

I'm running a Matrox RT.X2. I have audio and video cables running from the break box to a TV monitor. The picture of my footage in Premier Pro comes out fine on the TV, except it's in Black and White. The same footage plays on the PC monitor at the same time in colour. The TV is a colour model, and hasn't been adjusted to B&W as it plays DVD's in colour. I also tried a different TV linked into the break box and had same problem. Tried all the ports on the break box and no joy. Also tried one audio/video cable connected to the break box, with the other end being a SCART going into the TV. Then tried A/V cables with same ends running from ports on TV to the break box. Again no change.

Can anyone help?

Thank You,

Tony Cook