(please help) Recover corrupted memory card

[ineedhelppls]

I've used mymc to open my memory card and it says  "/: Corrupt directory"
All the saved memory is gone for all the games I've played. 

Is there any way to recover it?
and is there any way to prevent it from happening again?

[jesalvein]

Please post the contents of the emulog.txt file after the problem occurs. The file can be found in "My Documents\PCSX2\logs" for the installer version or in "PCSX2\logs" for the portable/binary version.

Please make sure to enclose your emulog in code tags like so (remove the empty space on the closing code tag!):
[code]
Pasted emulog goes here
[ /code]

[ineedhelppls]

I stupidly reinstalled pcsx2 without saving the logs. I only kept a copy of the Mcd001.ps2 file