mysql数据库，在php中即使用正确的密码也不能登录，而在mysql本身的管理程序中却可以，请高手指点？

那不大可能，你把PHP和数据库连接部分的代码贴出来。

<?php
  $db_host = "localhost";
  $db_user = "phpt";
  $db_password = "f00";
  $db_name = "buzzDB";
?>
<?php
  $connection = mysql_connect($db_host, $db_user, $db_password) or die ("error connecting";
  echo "connection made";
?>

====================
Warning: mysql_connect() [function.mysql-connect]: Client does not support authentication protocol requested by server. Consider upgrading MySQL client in E:\Long PC\Website\plant\temp\temp_con.php on line 9
error connecting

<?php
  $db_host = "localhost";
  $db_user = "phpt";
  $db_password = "f00";
  $db_name = "buzzDB";
?>
<?php
  $connection = mysql_connect($db_host, $db_user, $db_password) or die ("error connecting";
  echo "connection made";
?>

====================
Warning: mysql_connect() [function.mysql-connect]: Client does not support authentication protocol requested by server. Consider upgrading MySQL client in E:\Long PC\Website\plant\temp\temp_con.php on line 9
error connecting
若不用密码，则一切正常！

Consider upgrading MySQL client
还是那个老问题：升级你的Mysql客户端

如何升级你的Mysql客户端

请问如何升级你的Mysql客户端

4.1衣裳的版本必需施用新的联接方法

要使用什么样的新的连接方法啊?????
实在是不明白的说
ps: 我是菜菜鸟