thnx very much.
The problem was to root username and password.

Can you help me to solve this problem with my web site. I have an PHP Events Script and an error looks like this:

Warning: mysql_pconnect() [function.mysql-pconnect]: Access denied for user 'londoni_root'@'localhost' (using password: YES) in /home2/londoni/public_html/config.php on line 2

Warning: mysql_select_db(): supplied argument is not a valid MySQL-Link resource in /home2/londoni/public_html/config.php on line 5

Warning: mysql_query() [function.mysql-query]: Access denied for user 'londoni'@'localhost' (using password: NO) in /home2/londoni/public_html/home.php on line 88

Warning: mysql_query() [function.mysql-query]: A link to the server could not be established in /home2/londoni/public_html/home.php on line 88

Warning: mysql_fetch_assoc(): supplied argument is not a valid MySQL result resource in /home2/londoni/public_html/home.php on line 90

My site has work properly but I had some problems with my bandwidth in my host, so I upgrate my host and this error start to show in my page. :(