upgrade to 3.8.4 Patch Level 2 errors

[محروم.كوم]

i uploaded all files* edited the config.php and got to the part of:

http://www.example.com/forum/install/upgrade.php


but - when i try to open that page i am getting mysql errors and i need help as now forums are down:

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Database error in vBulletin :
mysql_connect() [function.mysql-connect]: Access denied for user 'myusername'@'localhost' (using password: YES)
/home/myusername/public_html/forums/includes/class_core.php on line 311
MySQL Error :
Error Number :
Request Date : Wednesday* December 23rd 2009 @ 09:46:38 AM
Error Date : Wednesday* December 23rd 2009 @ 09:46:39 AM
Script : http://www.mysite.com/forums/install/upgrade.php
Referrer :
IP Address : 81.124.135.50
Username :
Classname : vB_Database
MySQL Version :

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help please! __DEFINE_LIKE_SHARE__