When you uploaded the files did you include your database name, database pass, and url. Here is the code in that file you need to make changes to or else it will not work.
$db_name = 'HERE';
$db_username = 'HERE';
$db_password = 'HERE';
$forumurl = 'http://YourSite.com/forum/';
Replace the red HERE with the details it is requesting.
This is what these lines of code mean and what you need to put between the two single quote marks 'some nice stuff here, blah blah blah'. What information you need to put is in bold red.
$db_name = Your database name
$db_username = Your database username
$db_password = Your database password
$forumurl - Your forum URL
If you do not know your database, username & password just navigate using a FTP or your File Manager in your web host to your forums directory and then find includes/config.php and download it. Open it in notebook or a HTML text editor and look for the info that I've marked in red...
// ****** DATABASE NAME ******
// This is the name of the database where your vBulletin will be located.
// This must be created by your webhost.
$config['Database']['dbname'] = 'vbulletin';
// ****** MASTER DATABASE USERNAME & PASSWORD ******
// This is the username and password you use to access MySQL.
// These must be obtained through your webhost.
$config['MasterServer']['username'] = 'username';
$config['MasterServer']['password'] = 'password';
Input those values into the script you have and try it again. Your script, using the example above would like like this:
$db_name = 'vbulletin';
$db_username = 'username';
$db_password = 'password';
$forumurl = 'http://www.myforum.com';
Also make sure that you include this code in your theme, I think where you want it to display although I'm not completely sure. You may need to check with the developer of the plugin for that info.
<script type="text/javascript">
setInterval(function(){ChangeForumPage('Current'); }, 30 * 1000);</script>
<div id="MTForumBlock">
<?php include('MTForumsBlock.php'); ?>
</div>
<div id="MTForumBlockControl">
<table cellpadding="0" cellspacing="0">
<tr>
<td class="MTForumButton"><a href="javascript:ChangeForumPage('Prev')"><img border="0" src="MTForumBlock_buttonParrow.png" /> ???</a></td>
<td id="MTFloader"></td>
<td class="MTForumButton"><a href="javascript:ChangeForumPage('Next')">??? <img border="0" src="MTForumBlock_buttonNarrow.png" /></a></td>
</tr>
</table>
</div>