New to vbulletin, completely lost

[zlongrscom]

My company has been using vBulletin 4, the people that set it up no longer work for the company. I have been asked to make our forums site work again, I have no idea where to start. I see tutorials that talk about logging in as admin etc, I don't see any place to log in. Can I only edit my site from the server it's setup on? When you go to my site it gives this error message:

The database has encountered a problem.
Please try the following:
Load the page again by clicking the Refresh button in your web browser.
Open the www.computer-repair-experts.com home page, then try to open another page.
Click the Back button to try another link.
The www.computer-repair-experts.com forum technical staff have been notified of the error, though you may contact them if the problem persists.

We apologise for any inconvenience.


---Any help at all would be greatly appreciated, even just a little tip or where to get started, assume I know NOTHING about any of this!