Upgrading 2.7 to 2.8


I’ve always used the module upgrade options, which helped me from 2.6 to 2.7 without problem.
I’ve recently tried to upgrade from 2.7 to 2.8 using the the upgrade option and it seems to have failed rather epically resulting in the loss of freepbx admin.

The FOP panel and recordings all work perfectly but when I click on ‘FreePBX Administration’, i’m prompted for my user and password then theres just the following text (upon correct details being entered)…

SELECT value FROM admin WHERE variable = 'version’
DB Error: no such table

Any ideas any one?