Save Data error???

Hey, um...i'm not sure if this has been asked already, but i'm getting a "save data" error for roms such as Metal Slug 7. "Save Data" is the only part of the japanese i can actually read so....yeh and it's happened to a few other games such as that Sonnic Tennis game. I'm not sure if it's cos Metal slug 7 is new or whateva, but i just wanted to ask if other people came up with this error and does anyone know how to fix it??? I'm using the R4 for the roms.thanks.

Try downloading the newest firmware, and next time post in the correct section. For downloading them try this site - www.linfoxfomain.com