Database error

Database error in vBulletin 3.6.4:

Invalid SQL:
SELECT COUNT(*) AS total FROM user WHERE joindate > (1196771106- 24 * 3600);

MySQL Error  : Lost connection to MySQL server during query
Error Number : 2013
Date         : Tuesday, December 4th 2007 @ 02:25:06 PM
Script       : http://xxx.com/
Referrer     : 
IP Address   : 88.228.131.21
Username     : Black
Classname    : vb_database