HELLO ! THANX FOR YOUR TUTORIALS . THESE WERE VERY HELPFUL FOR ME.. BUT AFTER I FOUND ALL , I COULDN'T GO RIGHT WITH CHANGE PASSWORD TUTORIAL. THERE IS AN ERROR COMING ON MY SCREEN .. YOU PLEASE CHECK IT OUT... Fatal error: Function name must be a string in C:\xampp\htdocs\changepassword.php on line 195 PLEASE TELL ME WAT IS THE PROBLEM

<?php


@$username = $_SESSION['username'];
@$submit=$_POST['submit'];
if ($username)
{
     if('submit')
       {   
    @$oldpassword =md5($_POST['oldpassword']);
    @$newpassword =md5($_POST['newpassword']);
    @$repassword =md5($_POST['repassword']);
 
    $connect = mysql_connect("localhost","root","");
    mysql_select_db("userlogin") or die();
    $queryget = mysql_query("SELECT password FROM users WHERE username='$username'") or die("couldn't connect!");
    $row = mysql_fetch_assoc($queryget);
       
    $oldpassworddb = $row['password'];
       
          if($oldpassword==$oldpassworddb)

            {
   
             if($newpassword==$repassword)
              {
             $querychange =mysql_query("UPDATE users SET password='$newpassword' WHERE username='$username'");
              
            die("Your password has been changed. <a href='mbkpage.php'>Return</a> back to main page");
   
                   }
               else
               die ("New Passwords Do Not Match");
            }
            ELSE
            die ("Old Passwords doesnt match");
     }                           
     else
      {
    echo"<form action='changepassword.php' method='POST'>
    Old Password: <input type='text' name='oldpassword'><p>
    New Password: <input type='password' name='newpassword'><br>   
    Repeat New Password: <input type='password' name='repassword'><p>
    <input type='submit' name='submit' value='Change Password'>
        </form>
        ";
        }
        }
    else
        die ("you must be logged in");
?>