'There is no DS Card inserted' help please.

Hey, First off let me apologize if this is in the wrong forum or if it has already been discussed. I'm just not very computer savvy or anything like that. I've got my R4 loaded up with games, I've DL'd WinRAR, I believe I have everything I need to get it working and playing games. However, when I start my DS up with the R4 and flash drive card inserted in it properly, it still says 'There is no DS Card inserted'. If anyone could help me out that would be awesome. Thanks in advance. cheers, Von

you have not installed the firmware on your R4. Find out which R4 it is (all the clones have different firmwares), download the correct firmware from www.linfoxdomain.com/nintendo/ds and extract the files to the root (top level folder) of your microSD