Aspies For Freedom

MySQL error: 126
Incorrect key file for table './aff_mainsite/affsite_sessions.MYI'; try to repair it
Query: DELETE FROM affsite_sessions WHERE uid=0 AND time<='1181872912'

my nose is bleeding from it allready.
maybe somebody can fix it?
only without shutting down the server for a whole day

because I bang my head on the screen every time I get this error message