Data Base error

[dave9720]

I am unable to open a sub forum post with a attachment. When open post I get data base error! Enclosed is recent email.

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A message that you sent could not be delivered to one or more of its
recipients. This is a permanent error. The following address(es) failed:

  dbmaster@example.com
    retry time not reached for any host after a long failure period

------ This is a copy of the message, including all the headers. ------

Return-path: <be*****e@serv01.siteground218.com>
Received: from localhost ([1**.0.0.1]:51794 helo=serv01.siteground218.com)
by serv01.siteground218.com with smtp (Exim 4.69)
(envelope-from <be*****e@serv01.siteground218.com>)
id 1Kdzhd-0006fX-HL
for dbmaster@example.com; Thu, 11 Sep 2008 22:52:13 -0500
X-SG-User: be*****e
To: dbmaster@example.com
Subject: vBulletin Database Error!
From: "dbmaster@example.com" <dbmaster@example.com>
Message-ID: <20080912035213.aef5c0944635@be****8****os.com>
MIME-Version: 1.0
Content-Type: text/plain; charset="ISO-8859-1"
Content-Transfer-Encoding: 8bit
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X-Mailer: vBulletin Mail via PHP

Database error in vBulletin 3.7.3:

Invalid SQL:

SELECT dateline, thumbnail_dateline, filename, filesize, visible, attachmentid, counter,
postid, IF(thumbnail_filesize > 0, 1, 0) AS hasthumbnail, thumbnail_filesize,
attachmenttype.thumbnail AS build_thumbnail, attachmenttype.newwindow
FROM attachment
LEFT JOIN attachmenttype AS attachmenttype USING (extension)
WHERE postid IN (-1,4693)
ORDER BY attachmentid;

MySQL Error   : Table './bestsate_vb/attachment' is marked as crashed and last (automatic?) repair failed
Error Number  : 144
Request Date  : Thursday, September 11th 2008 @ 10:52:13 PM
Error Date    : Thursday, September 11th 2008 @ 10:52:13 PM
Script        : http://be****8****os.com/showthread.php?p=4693
Referrer      : http://be****8***os.com/forum.php
IP Address    : 7*.*2.**1.84
Username      : Dave
Classname     : vB_Database
MySQL Version : 5.0.45-community-log