saved data

Hi, im trying to play Grand heft Auto. Ive installed it onto my DS and the game asks if i want to create a saved file , i click ok then the screen turns black with the message " saved data could not be accessed please turn off and re insert the card" . Anyone know what im doing wrong ?
Ive downloaded the game from 3 different files and get the same result .!! sssooooo frustrating ???

Take a look in this topic.
https://www.romulation.org/forum/index.php?topic=29845.0

thanks for the reply , but thats just confused the hell out of me ! sorry im a bit new to this stuff. Can you guide me as to what i do next ?. Thanks :P

It depends on your flashcart. Most of them work by just updating your firmware.