FATAL ERRORS In build_datastore() ...?!

[psoexplorer]

I know this isnt the right place to post this question, but I've tried at the official VB board and nobody knows anything about it. Hopefully someone here has an answer for me?

I've had this forum for a while now, and it's been great. But now for some reason whenever I try to do something in the admin control panel, like save a changed option, I get a build_datastore() fatal error.... It's a different file for every different option I'm using though, for example when I try to turn the forum on or off, I get this:

Fatal error: Call to undefined function: build_datastore() in /home/u3/gamedreamz/html/forum/includes/adminfunctions.php on line 1785

And when I try to update a usergroup setting, I get this:

Fatal error: Call to undefined function: build_datastore() in /home/u3/gamedreamz/html/forum/includes/adminfunctions.php on line 1785

As you can see, the error is still the same, but depending on the option I'm changing, it's a different line and in some cases a different php file alltogether.

I dont know what to do!