problema de plugin

Database error in vBulletin 4.0.7:

Invalid SQL:

                SELECT plugin.*, IF(plugin.product = '', 'vbulletin', product.title) AS producttitle
                FROM plugin AS plugin
                LEFT JOIN product AS product ON (plugin.product = product.productid)
                ORDER BY producttitle, plugin.title;

MySQL Error   : Got error 28 from storage engine
Error Number  : 1030
Request Date  : Saturday, November 20th 2010 @ 05:29:51 PM
Error Date    : Saturday, November 20th 2010 @ 05:29:52 PM
Script        : http://www.ssss.com/admincp/plugin.php?do=modify
Referrer      : http://www.ssss.com/admincp/index.php?do=nav
IP Address    : 0000000
Username      : Jtttt
Classname     : vB_Database
MySQL Version : 5.0.91-community

Database error in vBulletin 4.0.7:

Invalid SQL:
(
                SELECT
                    fd.thumbnail_dateline, fd.filesize, IF(fd.thumbnail_filesize > 0, 1, 0) AS hasthumbnail, fd.thumbnail_filesize,
                    a.dateline, a.state, a.attachmentid, a.counter, a.contentid, a.filename, a.userid, a.settings, a.displayorder,
                    at.contenttypes
                FROM attachment AS a
                INNER JOIN filedata AS fd ON (fd.filedataid = a.filedataid)
                LEFT JOIN attachmenttype AS at ON (at.extension = fd.extension)
                WHERE
                    a.contentid = 84
                        AND
                    a.contenttypeid = 1
            ) UNION ALL (
                SELECT
                    fd.thumbnail_dateline, fd.filesize, IF(fd.thumbnail_filesize > 0, 1, 0) AS hasthumbnail, fd.thumbnail_filesize,
                    a.dateline, a.state, a.attachmentid, a.counter, a.contentid, a.filename, a.userid, a.settings, a.displayorder,
                    at.contenttypes
                FROM attachment AS a
                INNER JOIN filedata AS fd ON (fd.filedataid = a.filedataid)
                LEFT JOIN attachmenttype AS at ON (at.extension = fd.extension)
                WHERE
                    a.posthash = '740ce232f248d3ab1ce12da3aef59901'
                        AND
                    a.userid IN (1,1)
                        AND
                    a.contenttypeid = 1
            )
ORDER BY displayorder;

MySQL Error   : Got error 28 from storage engine
Error Number  : 1030
Request Date  : Saturday, November 20th 2010 @ 05:59:19 PM
Error Date    : Saturday, November 20th 2010 @ 05:59:19 PM
Script        : http://www.oooo.com/editpost.php?do=updatepost&postid=84
Referrer      : http://www.oooo.com/comedia-online/84-un-peque%F1o-cambio-2010-a.html
IP Address    : oooooo
Username      : oooo
Classname     : vB_Database
MySQL Version : 5.0.91-community