Acekard Help

I just got a acekard for christmas and when I put it in my DS (I put my old R4's SD card in the acekard) and when I tried it it said "system file is missing"
What's going on??

well, if you are putting your r4 card, then maybe you still have r4 firmware in it. you need akaio to run it on acekard :P. download here: http://www.akaio.net/forum/download/file.php?id=145 before adding it. backup your games and sav files. format card and then add akaio, your games and sav files to the card

So I just drag and drop everything in the folder? AIO etc

yes. the _aio folder and akmenu4.nds