Help with my Register Script

[amras123]

<?php
    $online = @fsockopen("112.205.30.106", 28000, $errno, $errstr, 1);
    if($online >= 1) { 
        echo '<b><font color=#00FF00>Online</font></b>';
    }
    else {
    echo '<b><font color=#FF0000>Offline</font></b>';
    }
?></li>

<br><li>Login Server:
<?php
    $online = @fsockopen("127.0.0.1", 23000, $errno, $errstr, 1);
    if($online >= 1) { 
        echo '<b><font color=#00FF00>Online</font></b>';
    }
    else {
    echo '<b><font color=#FF0000>Offline</font></b>';
    } 
?></li>
<br><li>World Server:
<?php
    $online = @fsockopen("127.0.0.1", 15400, $errno, $errstr, 1);
    if($online >= 1) { 
        echo '<b><font color=#00FF00>Online</font></b>';
    }
    else {
    echo '<b><font color=#FF0000>Offline</font></b>';
    } 
?></li>
					</ul>
				</li>
				
				
			</ul>
		</div>
		<!-- start content -->
		<div id="content">
			<div class="post">
			
				<div class="entry">
					<p><?php
require('./configs/reg_conf.php');
	function doesUsernameExist($name){
	    $exit = FALSE;
	    $result = @mssql_query("SELECT * FROM ACCOUNT_TBL WHERE account='$name'");
	    if (mssql_num_rows($result) != 0){
	        $exit = TRUE;
	    }
	    return $exit;
	}

	if(isset($_POST['submit'])){
	    $user = preg_replace ("[^A-Za-z0-9]", "", $_POST['username']);
	    $pass = preg_replace ("[^A-Za-z0-9]", "", $_POST['password']);
	    if($_POST['username'] == ""){
	        echo '<font color="red">Enter a user.</font><br /><br />';
	    }
	    else if($_POST['password'] == ""){
			echo '<font color="red">Enter a password.</font><br /><br />';
	    }
	    else if ((strlen($_POST['username']) > 16) || (strlen($_POST['username']) < 3)){
			echo '<font color="red">The user should be 3 to 16 characters.</font><br /><br />';
	    }
	    else if ((strlen($_POST['password']) > 16) || (strlen($_POST['password']) < 3)){
			echo '<font color="red">The password should be 3 to 16 characters.</font><br /><br />';
	    }
	    else if($_POST['username'] != $user){
			echo '<font color="red">User with invalid characters.</font><br /><br />';
	    }
	    else if($_POST['password'] != $pass){
			echo '<font color="red">Password with invalid characters.</font><br /><br />';
	    }
	    else {
			$pass = md5('serus' . $pass);
            if(!doesUsernameExist($user)){
                $stmt = mssql_init('[B]createaccount[/B]', $link);
                mssql_bind($stmt, '@account', $user, SQLVARCHAR, false, false, 15);
                mssql_bind($stmt, '@password', $pass, SQLVARCHAR, false, false, 36);
                mssql_execute($stmt) or die ("Something is wrong on the execution");
                mssql_free_statement($stmt);
				echo '<font color="blue">Register Successfull.</font><br /><br />';
            }
            else {
				echo '<font color="red">User already Exist.</font><br /><br />';
            }
        }
		mssql_close();
    }
	
	echo '<form action="register.php" method="post">';
	echo 'Username: <input type="text" name="username" /><br />';
	echo 'Password: <input type="password" name="password" /><br />';
	echo '<input type="submit" name="submit" value="Register" />';
	echo '</form>';

?>

when i'm using the query of webCreateAcc instead of the createaccount abouve.. i get error invalid function.. the query of my SQL has 3 inputs user pass email. but this script only has two inputs.. Is that the problem?