R4 issue when loading

my card worked perfectly fine until yesterday i added a new game and ever since i turn the ds on it says loading then screen goes blank wonder if some one could help i have also removed the game as thought it may have crashed due to too much stuff on card...im using a kingston 2GB micro SD hope some one can help..

could be the firmware getting screwed with, i've played a few games myself that would make the R4 not read anything. back-up all your files, format the SD disk, and try putting in a fresh copy of the firmware, not sure if it will solve anything but it always works for me

https://www.romulation.org/forum/index.php?topic=1462.0