Create New Thread with Non-vB Script

[myHybridcar.com]

Okay, thanks. I think I'm 90% there. The following code works when it's on its own page, but when I include it in the rest of my script I get the following error:

Fatal error: Database object is not an object in [path]/includes/class_dm.php on line 172

Do you know why this might be happening?

PHP Code:

error_reporting(E_ALL & ~E_NOTICE); 

        require_once('/home/myhybrid/www/forums/includes/functions_misc.php');
        require_once('/home/myhybrid/www/forums/includes/class_dm.php');
        require_once('/home/myhybrid/www/forums/includes/class_dm_threadpost.php');

        $forumid=36;
        $vb_username=$vbulletin->userinfo['username'];
        $body='body';
        
        global $botpermissons, $vbphrase;
        $userinfo=fetch_userinfo($vb_uid);
        $threadinfo=array(); 
        $foruminfo=fetch_foruminfo($forumid); 
        $threaddm=new vB_DataManager_Thread_FirstPost($vbulletin, ERRTYPE_STANDARD); 
        $threaddm->set_info('forum', $foruminfo); 
        $threaddm->set('forumid', $forumid);
        $threaddm->set('userid', 1); 
        $threaddm->set('title', $name); 
        $threaddm->set('pagetext', $body);  
        $threaddm->set('open', 1); 
        $threaddm->set('allowsmilie', 1); 
        $threaddm->set('visible', 1); 
        $threaddm->pre_save(); 
        $threadid = $threaddm->save(); 
        unset($threaddm);