Help! Trouble accessing some downloaded games

I have an R4 card and have tried downloading most of the Imagine games and the Americas Next Top Model game.
The message I keep getting on some of the downloaded games is 'The save data could not be accessed. Please turn the power off and reinsert the DS card'. This doesn't happen on all games, it only seems to be on the newer games.Any advice would be very much appreciated.

Is this on a flashcart i.e. R4, CycloDS, or the No$Gba?

Replying to #2

He/She said R4... >.>Update your firmware.Oh, and INB4FLAME of "Imagine" shovelware titles.

Sorry I am completely blonde. It is an R4 card which has 'Revolution for DS (NDSL/NDS) written on it. Does that help answer your question... sorry to be so dim! :)

Thanks for your advice.... how do you "Update your firmware. Oh, and INB4FLAME of "Imagine" shovelware titles." Sorry to be such a dunce!

No worries. And for the record, See the Joker picture? Nothing wrong with a dumb blonde. :-)Now, anyways, I don't have an R4, but this link should help.

https://www.romulation.org/forum/index.php/topic,11185.0.html

Dwonload firmware, extract, overwrite previous firmware files with new files on MicroSD root directory.