PHP error happened

Technical information
Error type2
Error descriptionmysql_connect() [function.mysql-connect]: Access denied for user 'boyceind'@'localhost' (using password: YES)
URLwww.boyceindustries.com/cartdata/showcategories_list.php?cgrp=Performance
Error file/home/boyceind/public_html/cartdata/include/dbconnection.php
Error line9
SQL query