Hey man I've been having the same issue from weeks and can't find a solution online anywhere. So I'll post with you
I'm using the R4i SDHC RTS from http://www.brandcheapest.com/r4i-sdhc-silver-card-real-time-save-for-3ds-console-ds-ndsl-ndsi-ndsixl-ll.html which was the site recommended by...