Create a thread remotely

[swellinfo]

My script looks something like this:

require_once('global.php');

then I get some user info from the $vbulletin object.

then I make a connection to the db like this:

$link = mysql_connect($host, $usr, $pass);
mysql_select_db($database, $link);

if ($_POST) { // the post vars pass info to create a thread remotedly
require('new_thread.php'); // this is the file i included in my first post

after the thread is created, the program goes on to make more sql db calls
}

then continues on to regular script.

Is there something I should be doing differently with the db connections?