Thank you for replying! =)
I tried using my friend's SD Card and it's fixed for now but I might try that later with another card (if used), thanks again! =D
So, have you guys found a way to fix this?? It's not very practical to connect the SD Card to the PC every time I reset my GameCube... =_= I even tried locking that switch on the SD Card but the swiss.ini file still finds a way to be written.