Harvest Moon: Island Of Happiness

Okay, here is my problem. I downloaded HM:IOH on to my DS Linker, I started the game but then a little way into it when i tried to save it said "Save data cannot be written, please turn off the game and reinsert gamecard" I have also tried downloading new firmware but that didn't make a diffference.
Can anyone help? Please? :'( xx

hope this help
https://www.romulation.org/forum/index.php/topic,10365.0.html

Have you got space on your memory card? You sometimes see a message like this when memory cards are full or nearly full. Try deleting a game you don't play any more and try again.