VBSeo_sitemap not working.

I got this error everydays:

Database error in vBulletin 3.6.8:

Invalid SQL:

INSERT INTO cronlog
(varname, dateline, description, type)
VALUES
('vbseo_sitemap_task',
1206309617,
'Google Sitemap Created',
0);

MySQL Error : Lost connection to MySQL server during query
Error Number : 2013

Do you know what is wrong with it?

Hello Peter,

does it work correctly when executed manually via vbseo_sitemap/ interface?

No, it does not work when i click on the "run sitemap generator ".

How many threads/posts do you have on the forum?

Not much,

it is realatively new forum, like 3000 posts or so.