I was trying to remove cached stations from slacker. First time it didn't remove any so I ran the sync program again and it gave me an error. I disconnected and now my bb says there is a problem with the media card. I tried a battery pull and it still is not reading it. It says "a media card has been inserter than contains errors, to correct, please use a disk error checking utility." I don't know what a disk error checking utility is.