nintendo ds

i have a R4i card for my nintendo,put software on it and some backupgames,when i put the card in the nintendo DS i see nothing on the screen,
can someone tell me what the problem can be

Well make sure you have all the necessary R4i files. If you do and it still doesn't load, your card may be fake or your DS may not be working right..

thx for reply
but how can i be sure i i have all the files and if my ds is working good
im sure the card is not fake,bought it brandnew from a shop

You must put everything in the ROOTDo NOT make extra maps!the files must be in the root folder :)had the same problem when I got my R4 (2 years ago)

Yeah, what Athemoe said too..