I'm having the same problem i brought the r4sdhc with 2 kingston 2gb micro cards i brought from memorybits.co.uk and they told me to download the r4sdhc v1.23 and i followed the instructions ( i have also watched videos on youtube) once i done that put the r4 sdhc into black nds lite it worked fine in my mums but put it into my black nds lite and it won't load i touch the screen and it says no ds card inserted me and my mum brought the nds lites at the same time. I've been playing professor layton that i got when we brought the nds lite and that works fine has anyone else had this problem and has solved it thks to anyone in advance that can help me.