安装Windows 2008 Server的AppServ后，MySql无法正常工作

I have installed AppServ 2.6.0 on Windows 2008 R2 but when I go to localhost/phpinfo.php I don't see mysql in there. I see "mysqlnd" I don't know what this is but it is there.I have installed AppServ 2.6.0 on Windows 2008