Description:
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im using iis,sql server 2005 and php 5.2.5
the php_mssql.dll extension is already uncommented in php.ini of php 5.2.5 win 32 installer, i have put the php_mssql.dll and ntwdblib.dll in system 32 and php\:extension folders the fatal error call to undefined function mssql_connect() still comes. 
 testing for availability of php functions using;-
<?php
if (function_exists('mssql_connect')) {
	echo "Okay, fn is there";
} else {
	echo "Hmmm .. fn is not even there";
}
 ?>
it returns the else part, where the problem will be??plz help me i have suffered this problem for months.  

Reproduce code:
---------------
the code i used to connect to the database is as follows;-
<?php
$dbserver="localhost, 1433";
$dbuser="sa";
$dbpass="adam";
$dbname="Student";
?>
then
<?php
$dbconn=mssql_connect($dbserver,$dbuser,$dbpass);
mssql_select_db($dbname, $dbconn) or die("Unable to Open The Database");
?>


Expected result:
----------------
to connect to sql server, unfortunately i couldnt, plz plz help me out of this big problem.