I have a AK2 card w/ firmware 4.23 installed and it plays the majority of my games however it doesn't work on some of the more recent games such as Sonic All-Star Racing (screen goes black after loading), Batman: Brave and the Bold (screen goes white), Iron Man 2 (screen goes white). What am I missing?
Certain newer DS games come with protection on them that prevent them from working with flashcards. You can sometimes find hacked versions of those games that will work, or use a code to get the game working. Of course if you really want the game you should just buy it.