PHP 4.4.0 with MySQL 4.1.13 on Win XP

I have used php 4.3.7 with mysql 4.0.20d on windows xp running iis 5.1 as well as php 4.4.0 with mysql 4.1.13 on linux redhat 8.0 running apache 2..0.54 successfully. Now, I have encountered a problem on windows xp: php 4.4.0 (maunally-installed package) phpinfo works fine. mysql 4.1.13 os: windows xp sp1 and sp2 webserver: tried both iis 5.1 and apache 2.0.54 Problem: php cannot connect to mysql. Error is something like: Warning: mysql_connect(): Client does not support authentication protocol requested by server; consider upgrading MySQL client in C:\Program Files\Apache Group\Apache2\htdocs\mysqltest.php on line 35 Have I missed something? Meanwhile, how could I make my php know MySQLi (Improved MySQL) library as I haven't seen anywhere that this library is not supported by windows? Thanks -- Soheil Noori Bushehri soheilnb@gmail.com