Blog Can´t upgrade Blog

[محروم.كوم]

Hi,
i have used vbulletin blog. When i try to upgrade to 4.0.5 i get this error:

Database error in vBulletin 4.0.5:

Invalid SQL:

INSERT IGNORE INTO tag
(tagtext, dateline)
SELECT blog_tag.tagtext, blog_tag.dateline
FROM blog_tag AS blog_tag;

MySQL Error : Table 'sitename.blog_tag' doesn't exist

Error Number : 1146

How can i fix this? __DEFINE_LIKE_SHARE__