Fatal error: Call to a member function query_first_slave() on a non-object

[digitalstudio]

Hi all.

(Using version 3.8.1)

I'm trying to write some code outside of VB. However, when i include the first VB file i get this fatal error:

Fatal error: Call to a member function query_first_slave() on a non-object in C:\Program Files\Apache Software Foundation\Apache2.2\htdocs\mywebsite\forum\includes\functions.php on line 1368

Here's the code that's throwing the fatal error:

class myclass
{
    public function doSomething()
    {
        chdir('/path/to/forum');
        require_once '/path/to/forum/global.php';
    }
}

Any ideas why this is happening!?!

Thanks.