There are many versions of oficial system (latest 4.21), there are many versions of nonoficial system (akaio - latest 1.5.1) and this one has many loaders update - last and working from 1.1.2010. and there is three acekard card with sign 2 (AK2, AK2.1, AK2i)
I can tell you only this one... format card, put AKAIO (latest) on it, dont need to update loaders (last version has the latest) and try to run it.
1. if doesnt work or have problems with running AKAIO - the ak2 could be fake
2. akaio has great game compatibility - when dont work, just press x button after starting a game - it could load in another mode and should start the game without problem...
If still doesnt work - try to enable/disable cheats, ds download play, soft reset options on system settings of akaio.
that is the way with "so many infos" you gave us...