Hiya Jackie,
While you're waiting for proper support, can you check that the info you have in your 'Connections/localhost.php' file is all correct:
<?php
# FileName="Connection_php_mysql.htm"
# Type="MYSQL"
# HTTP="true"
$hostname_localhost = "localhost"; /* This is probably correct. */
$database_localhost = "databasename"; /* Edit this */
$username_localhost = "databaseusername"; /* Edit this */
$password_localhost = "databaseuserpassword"; /* Edit this */
$localhost = mysql_pconnect($hostname_localhost, $username_localhost, $password_localhost) or trigger_error(mysql_error(),E_USER_ERROR);
?>