windows10更新在哪里:PHP+MYSQL高手请来@!@

<?
$aa=mysql_connect("localhost","root","fo2");
mysql_select_db("nan",$aa);
$bb="select * from nanpass";
$dd=mysql_query($bb);
$kk=$shuchu=mysql_num_rows($dd);
echo $kk;
?>
=======================
Warning: mysql_connect(): Client does not support authentication protocol requested by server; consider upgrading MySQL client in c:\inetpub\wwwroot\11.php on line 2

Warning: mysql_select_db(): supplied argument is not a valid MySQL-Link resource in c:\inetpub\wwwroot\11.php on line 3

Warning: mysql_query(): Access denied for user 'ODBC'@'localhost' (using password: NO) in c:\inetpub\wwwroot\11.php on line 5

Warning: mysql_query(): A link to the server could not be established in c:\inetpub\wwwroot\11.php on line 5

Warning: mysql_num_rows(): supplied argument is not a valid MySQL result resource in c:\inetpub\wwwroot\11.php on line 6
===============================
数据库账号:root
密码:fo2
数据库名:nan
有一个表:nanpass
不知为什么.怎么每一句都有错啊.我实在是检查不出来.
MYSQL是5.0的....是不是这个问题啊?