I am using a 2gb microSD card on the R4i for DSi. When I insert the R4i and select R4, I get a message which says 'Loading...' and nothing happens after that. I tried it on a friends older DS and it worked perfectly with all my games showing up. On removing it from the DS and immediately inserting into the New DSi the games now show up and I am able to play. But If I turn it off and turn it back on, then it goes back to the 'Loading...' message. It only works the first time on my DSi after loading it onto a DS and removing it. I updated the firmware from their website but no change. Any help/ info is greatly appreciated. This is the site and product. http://www.r4i-sdhc.com/indexe.asp I've now reformatted the SD card and updated it with v1.09 firmware. Still no luck.