Please Help Games Freeze up

PLEASE HELP ME GAMES ARE FROZEN UPFinal Fantasy Chronicles: Echoes of time will not allow me to save the game. Error Message: Could not save data. Turn the power off and reinsert the ds game card. Please Help I really want to play this gameKingdom Hearts 358-2day. Cant play this game at all.get to the start up menu and once i click start. The game freeze.Just a black screen.Might and Magic: Clash of Heroes: Cant play this game at all. The game doesn't load. All I hear is music. Just a black screenMario and Luigi: Inside Browser Story: Cant play this game at all. Get to the start up menu and once i click start. The game freeze. Just a black screenThe Legend of Zelda: Spirit Tracks...When i get on the train. It freeze and it will not allow me to do anythingI have the R4 Card Last Firmware v1.18Can ANYONE I MEAN ANYONE HELP ME PLEASE I Really want to play those games

All of those games have anti-piracy.For Echoes of Time
https://www.romulation.org/forum/index.php?topic=15461.msg173425#msg173425For Kingdom Hearts
https://www.romulation.org/forum/index.php?topic=23731.0For Might and Magic
https://www.romulation.org/forum/index.php?topic=28647.0For Mario and Luigi
https://www.romulation.org/forum/index.php?topic=22731.0For Legend of Zelda
https://www.romulation.org/forum/index.php?topic=28754.0First post has the solution

Ysmenu for R4 original will play them games unpatched, (U) rom only!https://www.romulation.org/forum/index.php?topic=27617.0DSTT v1.17a12 YSmenu For R4 Original Users , Updated 2010/01/25http://www.mediafire.com/download.php?5ymy2diodyyPost Merge: [time]1265306537[/time]
Its possible it could be your microsd card as some read faster then overs, I use kingston myself and not had any freezeing problem