Database error

[leannet]

Can anyone help me with this please

Database error in vBulletin 3.7.1:

Invalid SQL:

SELECT * FROM user FORCE INDEX (lastactivity)
WHERE lastactivity > 1256562000 ORDER BY username;

MySQL Error : Incorrect key file for table './xxxxxxxxxxxxx/user.MYI'; try to repair it
Error Number : 126
Request Date : Tuesday, October 27th 2009 @ 12:39:16 AM
Error Date : Tuesday, October 27th 2009 @ 12:39:17 AM
Script : http://www.xxxxxxxxxxxxxx.com/
Referrer :
IP Address : xxxxxxxx
Username : xxxxx
Classname : vB_Database_MySQLi
MySQL Version : 5.0.85-community-log