White page of death with error message

Does anyone know what the code below means when trying to access the wp-admin page for http://www.blog.i-bidder.com/ ?

Recent changes:
– removed platinum seo pack
– added the Yoast WordPress SEO Plugin

As far as I’m aware it was working following that change.

Then:
– added the Breadcrumb NavXT plugin

Following that, it has not been possible to log in.

We have tried rolling the database back to a previous version from when it was working. (It is currently in it’s rolled back state) No success. Also tried disabling both the plugin and theme folders by renaming them. No success on that either.

#!/usr/local/bin/php -q We're running this query: SELECT * FROM vhost_servers WHERE hostname = 'lin210.gridhost.co.uk' LIMIT 1 Table 'blogibid_new.vhost_servers' doesn't exist

Any ideas on how to fix this and restore access to the backend?

Thanks in advance.