bluedelta smart scart - no picture but have sound

[techmob]

As title says i have a bluedelta smart scart this is it

basically lets you connect RGB devices to it, then it connects to the tv

my sky+ box connects fine and gives both sound and picture,

but my dreambox (satellite box )does not give a picture but i have sound

i have tried connecting it on all different sockets on the blue delta and it still gives sound but no picture, i have even used the same connection and cable as the sky box and it still gives only sound no picture

in the av settings on the dreambox it is set to RGB

if i directly connect the dreambox to the tv i get both sound and a picture

i have phoned bluedelta technical support and they said my dreambox must be at fault, but as it works directly to my tv rgb then i think that is an unfair thing to say

anyone have any ideas

cheers