无法连接数据库

提示:
Warning: mysql_connect() [function.mysql-connect]: Access denied for user 'root'@'localhost' (using password: NO) in D:\EasyPHP 3.0\www\include\config.inc.php on line 7
數據連接失敗

连接PHP:
<?php
$dbhost= "localhost";
$dbuser="root";
$dbpass="";
$dbname= "sili";
//$db_conn=mysql_connect("localhost","abc","xyz") or die("Can't connect!!");
mysql_connect($dbhost,$dbuser,$dbpass) or die ("數據連接失敗");
$qz= "dy_";
$str_button="版权所有伟业有限公司建议您以IE 5.0 800 X 600 以上高彩模式浏览本站";
$c_name="New Century";
?>


实在不知何故，数据库也配置好了，用户名为root,密码未设置，数据库名sili，为什么就是连不上呢？是不是ＥＡＳＹＰＨＰ不行？