I've been using my R4 for a while now, and just two days ago my DS (regular one, not the lite) stopped recognizing my R4. Tis isn't the first time this has happened, but it is the first time where it doesn't fix by just blowing the dust out of the SD card and the R4. For instance, Wen my R4 is in there, I've blown all the dust out, I start up my DS, and it says there is no DS card inserted. I have fully charged my DS, left it alone over-night, and even tried on multiple occasions. No response. I was hoping that I'm just doing something wrong, but it's still a possibility that my DS has just gotten too old (I've had it since the Christmas that it first came out on). My DS does recognize regular games, by the way.