Missing graphics via Scart/rf output

I got a new box today (372T) as my old one (370) was on its way out.

I do the bulk of my viewing in the lounge with the YV box connected to the TV via hdmi.

I also connect the scart out of the YV box to a vhs recorder and then take the output from there via an rf cable to a tv in the kitchen. Before with the old box, i could see the picture and also menu items/subtitles/Guide graphics etc.

With the new box these do not come through.

So for example if i press Guide, i see a blank screen where the guide should be but see the small tv window in the top right hand corner.

Any ideas? I've gone though the menu items to see if there is some setting but nothing obvious.

rf loop through is set to on

thanks