ERROR " the save data could not be accessed. Please turn the power off & reinse

When I load a newly downloaded game, sometimes the DS will tell me that I need to take out the card and start the power back. The same game will work on a DSTT card but my R4 card it won't work. Has anyone had this problem? The G-Force, Shaun White snowboarding, Transformers, Modern warfare games show this after I upload it to the R4 card. What am I doing wrong?

Have you read the Common Issue thread?and you're posting in a wrong section. :D

I've got a tt card so im not sure.Wich are you downloading?If you downloaded U try downloading e that might help