[help] im always get min 300message/day (database error)

[geevest.com]

hello im always get 300 messages minimum/day.
message is : error.

Its the sample :

Database error in vBulletin :

mysql_connect() [<a href='function.mysql-connect'>function.mysql-connect</a>]: Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2)
/home/zhazha/public_html/forum/includes/class_core.php on line 311

MySQL Error :
Error Number :
Request Date : Friday, May 30th 2008 @ 02:49:16 PM
Error Date : Friday, May 30th 2008 @ 02:49:17 PM
Script : http://anakayam.us/forum/showthread.php?t=10412
Referrer : http://anakayam.us/forum/indonesian-...er/index2.html
IP Address : 125.163.208.178
Username :
Classname : vB_Database
MySQL Version :

--------------Database error in vBulletin :

mysql_connect() [<a href='function.mysql-connect'>function.mysql-connect</a>]: Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2)
/home/zhazha/public_html/forum/includes/class_core.php on line 311

MySQL Error :
Error Number :
Request Date : Friday, May 30th 2008 @ 02:49:14 PM
Error Date : Friday, May 30th 2008 @ 02:49:15 PM
Script : http://anakayam.us/forum/forumdisplay.php?f=18
Referrer : http://anakayam.us/forum/
IP Address : 125.163.7.157
Username :
Classname : vB_Database
MySQL Version :==========
======================
Database error in vBulletin 3.7.0:

Invalid SQL:

SELECT *
FROM bbcode;

MySQL Error : MySQL server has gone away
Error Number : 2006
Request Date : Friday, May 30th 2008 @ 02:49:10 PM
Error Date : Friday, May 30th 2008 @ 02:49:14 PM
Script : http://anakayam.us/forum/indonesian-bugil-cover/
Referrer : http://anakayam.us/forum/
IP Address : 222.124.219.54
Username : gauzkeren
Classname : vB_Database
MySQL Version :
===================
Database error in vBulletin 3.7.0:

Invalid SQL:

UPDATE session
SET lastactivity = 1212173406, location = '/forum/', inforum = 0, inthread = 0, incalendar = 0, badlocation = 0, useragent = 'Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1.12) Gecko/20080201 Firefox/2.0.0.6;MEGAUPLOAD 1.0'
WHERE sessionhash = '2eef7daac48dba5fb6ea371c2ef75f62';

MySQL Error : MySQL server has gone away
Error Number : 2006
Request Date : Friday, May 30th 2008 @ 02:50:06 PM
Error Date : Friday, May 30th 2008 @ 02:50:18 PM
Script : http://anakayam.us/forum/
Referrer : http://anakayam.us/forum/
IP Address : 203.89.24.230
Username : Unregistered
Classname : vB_Database
MySQL Version :
===================
Database error in vBulletin :

mysql_connect() [<a href='function.mysql-connect'>function.mysql-connect</a>]: Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2)
/home/zhazha/public_html/forum/includes/class_core.php on line 311

MySQL Error :
Error Number :
Request Date : Friday, May 30th 2008 @ 02:50:17 PM
Error Date : Friday, May 30th 2008 @ 02:50:18 PM
Script : http://anakayam.us/forum/showthread.php?t=57
Referrer : http://anakayam.us/forum/setengah-baya/
IP Address : 202.59.166.78
Username :
Classname : vB_Database
MySQL Version :
========================Database error in vBulletin 3.7.0:

Invalid SQL:

INSERT IGNORE INTO session
(sessionhash, userid, host, idhash, lastactivity, location, styleid, languageid, loggedin, inforum, inthread, incalendar, badlocation, useragent, bypass, profileupdate)
VALUES
('7fcd0b5937fd2656d9040d8c6a516c5c', 14418, '125.163.7.157', '4e2a8730267cc25f2374b5ebc92ecc15', 1212173404, '/forum/showthread.php?t=994', 0, 0, 1, 97, 994, 0, 0, 'Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1.14) Gecko/20080404 Firefox/2.0.0.14;MEGAUPLOAD 1.0', 0, 0);

MySQL Error : MySQL server has gone away
Error Number : 2006
Request Date : Friday, May 30th 2008 @ 02:50:04 PM
Error Date : Friday, May 30th 2008 @ 02:50:13 PM
Script : http://anakayam.us/forum/how-profess...dari-pink.html
Referrer : http://anakayam.us/forum/how-profess...ri-pink-4.html
IP Address : 125.163.7.157
Username : bexaloy
Classname : vB_Database
MySQL Version :

if i get error message in email . my guest always reset to 0 (kickout from my site)
im confused about this.
if im reinstall my forum in to vb.3.7.1,is my problem solved or not ?

thanks
how i can fixed this?