EDIT: IT WAS JUST A CONTACT ISSUE. I correctly flashed the card! I put the f_core.dat and system folder in the root of the card. Then I plugged in the power cable and it started blinking. Yet when I put it in my DSi it doesn't show up! I specifically followed all of the steps listed in the manual. Can anyone here help me with this problem I have? I am using a 4gb class 2 sandisk microsdhc card if that matters.