Error On Install Upgrade

[محروم.كوم]

hi*
i keep getting this Error On Install Upgrade* So where am i going wrong please
Database error in vBulletin :

mysql_connect() [function.mysql-connect]: Access denied for user 'root'@'localhost' (using password: NO)
/home/magicalp/public_html/upload/includes/class_core.php on line 311

MySQL Error :
Error Number :
Request Date : Tuesday* November 17th 2009 @ 03:37:21 AM
Error Date : Tuesday* November 17th 2009 @ 03:37:21 AM
Script : http://www.magicalproteachings.com/u...ll/upgrade.php
Referrer :
IP Address : 86.162.161.249
Username :
Classname : vB_Database
MySQL Version :


__DEFINE_LIKE_SHARE__