I need urgent help with a database!

I don’t know what I did wrong and now this message appears on the website:
Warning: mysql_connect() [function.mysql-connect]: Access denied for user ‘steve_wff’@‘208.113.246.18’ (using password: YES) in /home/steve_wff/worldfamousflags.com/usssa/system/database/mysql.php on line 6
Error: Could not make a database connection using steve_wff@mysql.worldfamousflags.com
Warning: mysql_close(): supplied argument is not a valid MySQL-Link resource in /home/steve_wff/worldfamousflags.com/usssa/system/database/mysql.php on line 67

What can I do about this and what did I do wrong, someone help me please!!