PHP error happened

Technical information
Error type2
Error descriptionmysql_connect() [function.mysql-connect]: Access denied for user 'sthelens_alan'@'localhost' (using password: YES)
URLwww.sthelenscombination.co.uk/admin/login.php?
Error file/home/sthelens/public_html/admin/include/dbconnection.php
Error line9
SQL query