Age of Empires - The Age of Kings

On 0324 - Age of Empires - The Age of Kings (U)(WRG)(F49A566E) the game video is very choppy to the point of unplayable on my AceKard 2I 1.51 (it is even worse on R4I Revolution SDHC White Box). The game plays fine on Desmume emulator.
The game is older, so I would not think its a copy protection issue. Anyone know why it is like this, or if a fix is available? Thank you.

Did you already updated your firmware? http://www.linfoxdomain.com/nintendo/ds/

Yes, using the latest 1.51 and also tried the two previous.

Replying to #3

Meaby back up all your files and try to format
Or just look on the flashcard makers forum in the bug threaths, if it isn't a problem well post it as a problem so they can fix it!