the memory card in slot A is damaged

[karstinpk]

I just got dolphin 2.0 and the first game i play is pikim 2 for gamecube, i play that for about 2 hours and i save the game and go on to play super smash bros brawl for WII and the game saves fine. then i go back to play pikmin 2 and the game says, "the memory card in slot A is damaged and cannot be used." and i can choose to play without saving... is there anyway to fix this so i can go back to playing normally from where i left off?