I recently downloaded Yoshi's Island DS to my Flash Cart [SD Mini] and it's not saving my progress past the first boss. If I exit the overworld screen, or turn the DS off, when I go back to the game, it will be back at the first boss. It doesn't seem to have a 'save' option on the game, so I assume it's suppose to auto save. Is it my cart or what, and how can I fix it?