HELP! My storage card suddenly is empty!

[cbus]

Ok - so I am at my son's baseball game and everything is working fine. I get home and now everything on my storage card is gone. All my files and cab files and pictures and music. What happened???? I didn't touch anything or drop it.

Please, is there a way to get this information back? it has a file on there that says:

EncFiltLog.menc.

I have never seen this before. I have a sandisk 6gb card and have never had any issues before.

Please help!