Go to Settings, then to Navigation Manager.
Click on edit for the Forums tab
The : Target URL
is where forum.php is, this is what is throwing the error when you click on the Forums tab on your forum

Try leaving it blank or putting in your url

--------------- Added [DATE]1343489712[/DATE] at [TIME]1343489712[/TIME] ---------------

Did that work?

--------------- Added [DATE]1343489825[/DATE] at [TIME]1343489825[/TIME] ---------------

I see your site it now changed back to the default /forum.php

It was fine as you had it before, you just needed to alter what I posted above

New Joe that DID IT!!!!

I knew it would.
You'll get use to vb over time mate.
Glad to help
PM me for the donation link..lol..

--------------- Added [DATE]1343490656[/DATE] at [TIME]1343490656[/TIME] ---------------

Just one more thing.
When you click Edit on the Forum tab and you see here:
click the right to 'no'

As at the moment you have /?tabid=2
on your url.
Hope it works.

Just checked you site again, looks like it all works fine now.

Glad to have helped