Problems with PAL ScartRGB Retros SYstems on SLG-in-a-box

[HX64]

I have an unmodded Saturn (and many others) with a ScartRGB cable connected to the SLG-in-a-box, but am getting no signal no matter what settings I use. Does the SLG-in-a-box have problems with PAL 576i and 288p?

Will be modding my Saturn, and many other systems, for 50hz/60hz and whatout, in the near future. I just thought that all I needed was ScartRGB cables and SLG-in-a-box and would be all good...
All cables are bought from RetroGamingCablesUK and ConsoleGoodsUK. Have no 60hz/ScartRGB setups to test for a fault in the Scart mounting on the boards either... Sega dreamcast+VGAbox through the VGA passthru is all good - no problems there. All my systems are PAL Australian too, if there's any peculiarities I don't know about...

Any info would great.