[WildSharky]

here is the right code as your made the name wrong like befor.. and thanks the sig works now to..
this

PHP Code:

    $threaddm->do_set('userid', $userid); 


should be this

PHP Code:

    $threaddm->do_set('userid', $postuserid); 


PHP Code:

// Start thread create 
    $threaddm = new vB_DataManager_Thread_FirstPost($vbulletin, ERRTYPE_STANDARD); 

    $username = htmlspecialchars_uni($username);  
    $allowsmilie = '1'; 
    $visible = '1'; 
    $sig = '1';  //show signature 1/on 0/off 
    eval('$pagetext .= "' . fetch_template('welcome_thread') . '";');  

// Insert thread 
    $threaddm->do_set('forumid', $forumid); 
    $threaddm->do_set('postuserid', $postuserid); 
    $threaddm->do_set('userid', $postuserid); 
    $threaddm->do_set('username', $postusername); 
    $threaddm->do_set('pagetext', $pagetext); 
    $threaddm->do_set('title', $title); 
    $threaddm->do_set('allowsmilie', $allowsmilie); 
    $threaddm->do_set('visible', $visible); 
    $threaddm->do_set('showsignature', $sig); 
    $tid = $threaddm->save();