MySQL Problem(Urgent)

Hi everyone,
My site displays these error message:
mp_users: Can’t find file: ‘mp_users’ (errno: 2)
mp_usermeta: Can’t find file: ‘mp_usermeta’ (errno: 2)
mp_posts: Can’t find file: ‘mp_posts’ (errno: 2)
mp_options: Can’t find file: ‘mp_options’ (errno: 2)
mp_postmeta: Can’t find file: ‘mp_postmeta’ (errno: 2)
mp_term_taxonomy: Can’t find file: ‘mp_term_taxonomy’ (errno: 2)
mp_term_relationships: Can’t find file: ‘mp_term_relationships’ (errno: 2)

What happen of my database?

Thanks a lot.