I know this problem has been asked but I after googling and searching, I still can't seem to fix the problem. Figured I'll make a thread for it. I keep on getting the constant loading screen after I install the firmware. I tried most of the different firmware available and none of them seem to work. I believe I am installing it correctly (akmenu4.nds + _aio / _ak2 folder on root). I also formatted the sd card several times when trying the different firmware. I have a mac so, I did it through disk utility and I downloaded Blueharvest as well. Here is what I'm working with, Red DS Lite AceKard2 (ver2.1) (from My Gaming Mart) PNY micro SD Macbook Pro So right now, I'm not sure if I'm doing something wrong or it's the Acekard or the SD card sucks. Here's a screenshot I uploaded last night when I was trying to get help from a friend Thanks for the help!