Wii can't read gamecube memory card

Theory #1:
Your Slot A is corrupted. You gotta send it to Nintendo, they will fix it.
Theory #2:
Do you use third party memorycards? Like bigben or madcatz memorycards with a lot of blocks like 1000 blocs or similar memorycards? Don't buy them, they're bad and it will blow up your save datas. Buy original Nintendo Memorcards, they're much more expensive BUT they will never delete data.
Theory #3:
Do you have the right version? Because you can't put an japanese Memorycard into an american Wii. Did you ever put an not american memorycard into the Slot A? If yes, that could be the reason why your Slot A won't work.

Fiend your solution direct from nintendo. Here is your solution....


http://www.nintendo.com/wiiconsole/prob676ijt65/solution

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