i need a help ..The table 'session' is full ??? and more issues

[Y-ZOOM]

Hello

After i transferred my forum to a dedicated server i faced some problems

This one

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Database error in vBulletin 3.7.4:
Invalid SQL:
INSERT IGNORE INTO session
(sessionhash, userid, host, idhash, lastactivity, location, styleid, languageid, loggedin, inforum, inthread, incalendar, badlocation, useragent, bypass, profileupdate, invideocategory, invideo)
VALUES
('7248dff1742302f045aebca37e0e9366', 2, '82.114.184.107', '17a17e9d86870c3fb9dfb25f570ccfed', 1232994870, '/vb/', 0, 0, 1, 0, 0, 0, 0, 'Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.1) Gecko/2008070208 Firefox/3.0.1', 0, 0, 0, 0);
MySQL Error : The table 'session' is full
Error Number : 1114
Request Date : Monday, January 26th 2009 @ 04:34:30 PM
Error Date : Monday, January 26th 2009 @ 04:34:30 PM
Script : http://y-zoom.com/vb/
Referrer :
IP Address : 82.114.184.107
Username : Y-zoom
Classname : vB_Database
MySQL Version : 5.0.67-community

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in my old hosting everything was okay .. is there any settings my server needs

and how can i optimize my server to solve this issue .. ??

i emptied the table but i need another solution to fix that !!


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Also i need to make my forum faster .. is there any way to optimize my PHP and Sql to be faster ??

sorry im not good in English

thanks