[mythtvnz] Help - Mythbuntu / S Video

[Kelvin Sim]

Hello

First time user of Myth here (actually mythbuntu).

I have set-up a box running mythbuntu 8.10 alright and can watch movies 
on my monitor OK.

But when I hook the box up-to the TV using S Video the resulting display 
is only in black and white.

I have googled the above issue and have found several suggestions that 
haven't been able to resolve the issue.

For TV Out I'm using a GeForce4 MX4000 card.  I'm using the Nvidia drivers.

Can anybody help?

Cheers

Kelvin