When i insert my R4i for DSi card, it start to say

You're not going to find manual support for a flash card like the R4.
Your best bet is to just reformat the SD card and start over again.
There's a great tutorial to set it up on http://www.dscardworld.com with pictures and links to all the official software on their support page.


If you suspect that you have unstable fake clone version you can get a genuine card there too. I managed to find this site after I got burned at a few others. Loved having my emails responded to because I had loads of questions, and they were quick to ship it.

Best of luck!

Actually read the manual then?