vBulletin Database Error!‏

[Dadopeman]

Lately i am getting errors very frequently, Can someone help me solve this problem?

Database error in vBulletin :

mysql_connect() [<a href='function.mysql-connect'>function.mysql-connect</a>]: Lost connection to MySQL server at 'reading initial communication packet', system error: 113
/hermes/web12a/b1950/moo.verifiedxxxorg/includes/class_core.php on line 311

MySQL Error :
Error Number :
Request Date : Thursday, December 22nd 2011 @ 09:03:46 AM
Error Date : Thursday, December 22nd 2011 @ 09:05:02 AM
Script : http://www.verifiedxxx.ms/index.php
Referrer : http://www.verifiedxxx.ms/online.php...e&pp=20&page=1
IP Address :
Username :
Classname : vB_Database
MySQL Version :

Please help me. Thanks.

--------------- Added [DATE]1324568015[/DATE] at [TIME]1324568015[/TIME] ---------------

Database error in vBulletin 3.8.3:

Invalid SQL:
SELECT *,
IF(displaygroupid=0, usergroupid, displaygroupid) AS displaygroupid
FROM user WHERE usergroupid = '2' ORDER BY RAND() LIMIT 30;

MySQL Error : Got error -1 from storage engine
Error Number : 1030
Request Date : Thursday, December 22nd 2011 @ 10:21:40 AM
Error Date : Thursday, December 22nd 2011 @ 10:21:41 AM
Script : http://www.verifiedxx.ms/index.php
Referrer : http://www.verifiedxx.ms/online.php
IP Address :
Username :
Classname : vB_Database
MySQL Version : 5.1.56-log

shows on the forum page and the above one, I receive via my email.