[Q] Lost SD card

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I install CM9 but found it had too many issues so I attempted to reinstall CM7 a3.5. It boots but it won't read the SD card and therefore it throws "Force Close" errors. Then I tried to go back to CM9 but it doesn't mount the SD card either and says the card is damaged. But it mounts fine in webOS. Any suggestions?

edit: I solved the problem. Had to run ACMEUninstaller prior to re-installing CM7.