My ncaa football 09 custom roster got deleted?

well the roster is still there, but all of my edits (equipment,position changes,# changes,rating changes,etc.) the only thing that is still there is the players names that i changed. which is only a few. (james bailey indiana WR into jerimy finch FS transfer from flordia) ive spent months editing that roster everyday little by little to make it more realistic & now its all gone & i dont know why. please someone help, even if they dont know why it happened just tell me what might of happened.