problem with rom games....

hi, I've a big problem....when I put a game on mi ds simply and I try to launch the game, every game says to me: the save data could not be accessed, turn off the game and reinsert ds card....what means? please help me, if yu can....
thanks :)

The Common Issues thread has your answer:
https://www.romulation.org/forum/index.php?topic=1462.0Also, your question is missing some key data, please read the How To Ask for Help thread as well.
https://www.romulation.org/forum/index.php?topic=1736.0

thank you, sorry but the forum it's very big eheh....thanks :)