Upgrading 3.0.7 to 3.6.3 - database error

[Ohiosweetheart]

In attempting to run the upgrade script, I received this error:

Database error in vBulletin :
Invalid SQL:
SELECT *
FROM vb3_datastore
WHERE title IN ('','options','bitfields','attachmentcache','forum cache','usergroupcache','stylecache','languagecach e','products','pluginlist','cron','profilefield');
MySQL Error : Table 'xmarks_vbull.vb3_datastore' doesn't exist
Error Number : 1146
Date : Friday, November 17th 2006 @ 09:29:14 PM
Script : http://www.xmarksthescot.com/forum/install/upgrade.php
Referrer :
IP Address : 72.23.105.106
Username :
Classname : vb_database



What is it that I need to do, please?

[Steve Machol]

Are you using the 3.6.3 config.php file and are you absolutely sure that your vB database tables have this prefix: vb3_