SD cards for Risc PC and formatting them

I have tried to install a SD to IDE interface in my RiscPC with out any luck. I have a blitz ide interface to which I wish to attach the interface. To date nothing has worked.

I use a CF to IDE interface with my Blitz and with the internal Risc PC IDE. Should be comparable.
I mean the Blitz was comming with a formatting tool on a disc.
My interface needs additional power. Without it not works.

All the currently available IDE to SD inbterfaces we’ve tried will NOT work with the Acorn IDE bus. But they do normally work with IDEFS interfaces. We’ve not got a Blitz to try one on:-(