problem with ez flash Vi

when i play roms on my ez flash some work, but a few such as the star wars jedi alliance rom, the mini ninjas rom or the scobby-doo first frights rom does not work. The starting and introduction screens of all the three roms appear and the roms work fine until the start up screens. As soon as i press start to begin the game the screens turn black and nothing happens afterwards. Plz someone help. I have all the latest firmwares and software for ez flash.
Post Merge: [time]1254318395[/time]
help plzzz

try downloading again, or use a nds emu for pc to test the rom: www.desmume.org

Backup your games and save files. Format your card, and start fresh with the latest firmware.

ok