Does Pokemon Diamond's saving/loading work fine with M3 Simply?

Ok I got a M3 Simply yesterday with a 2gb micro sd card. Pokemon diamond works on it but my friend said he heard people's saves of Pokemon diamond disappear if they played it off a card? Is this true? Am I fine with the combination I have? It seems to work and save fine but what about later?

 

I havn't had any problems with Pokemon Pearl on my M3 DS Simply, and i'm about half way through the game.

 

ive beaten the game and everything was fine with my M3 Simply. Sometimes its hard to connect on wifi, but that doesnt necessarily mean its the M3's fault, it can easily be my routers fault.

 

For some reason I cant load saved games, any ideas?

 

i cant either when i load the screen just turns black maybe a bad rom?

 

Neither can I, black screen just comes up as soon as I press continue.

 

Hah! I knew I wasnt the only one who had this problem.
I bet you guys can't get to the Wifi settings either.

I've tried
-Various Firware
-Different roms (trimmed and untrimmed)
-Saving a few different times, moving the files around, converting them, nothing.