Nokia 6300: All music has disappeared from memory card

[SOUNDSTYLE]

I have fitted a 2GB Sandisk memory card and did have 1GB of albums on it.
Went to listen to some music today and it was empty!
Anyone had this problem before?
Has the music actually disappeared and is it possible to get it back?
Is it possible to stop this from happening again?
Thanks

[john316]

Is the card blank when you view it elsewhere?

[SOUNDSTYLE]

Sorted: I took the memory card out and reinserted it. All music was found.