hi! actually, a couple of weeks ago, i bought a DSi and an R4 card..thing is suddenly it stopped working. I select the R4 menu on the DSi menu and it goes blank (A white screen, nothing else....)...it was working well for the first few days..and then suddenly, it started to blink..and after a couple of minutes the R4 menu used to appear..but now, that has stopped too. nothing comes and i dunno what to do...pls..if anyone has a solution, do share! :) thanks!!