last 10 problems since upgrading to 3.53

[kath]

I'm not sure it was compatible in 3.53. For that matter, I don't think it was compatible in that previous version but we got it to work. There is a last104config file and a last104 file. Line 14 of the config files states:
1.<?
2.
3.//...........Last X Posts v1.0.5...........\\
4.//......by Kevin (kevin@tubescan.com)......\\
5.
6.// For vBulletin version 2 (betas 3, 4, 5, RC1, RC2, RC3)
7.// (c) 2001 Jelsoft Enterprises, Ltd.
8.
9.// vBulletin.com thread: http://www.vbulletin.com/forum/showt...threadid=12324
10.
11.// let's get connected
12.require("last104config.php");
13.require("$path/config.php");
14.$db=mysql_connect($servername,$dbusername,$dbpa ssword) or die("Can't open connection to MySQL");
15.mysql_select_db($dbname) or die("Can't select database");

I'm not real experienced in reading these codes. So please bear with me but the error message says:
Warning: Access denied for user: 'www-data@localhost' (Using password: NO) in /var/www/sites/mysite.com/last104.php on line 14

Warning: MySQL Connection Failed: Access denied for user: 'www-data@localhost' (Using password: NO) in /var/www/sites/mysite.com/last104.php on line 14
Can't open connection to MySQL

Any ideas on what might be wrong?
Thanks,
Kath