PHP error happened

Technical information
Error type2
Error descriptionmysql_connect() [function.mysql-connect]: Access denied for user 'inkguardn2'@'213.171.218.160' (using password: YES)
URLwww.inkguard.net/rfi_add.php?
Error file/home/fhlinux159/i/inkguard.net/user/htdocs/include/dbconnection.php
Error line9
SQL query