PHP/MySQL Problem

Hello.
I have tried to make a script that will update a user's 'points' if they post a correct answer.
Unfortunately I can't get it to work. Could you help me out?

<?php

        if (isset($_POST['answer'])){
            if ($_POST['answer'] == 'answer){

$con = mysql_connect("XXXXXXXXXXXXXXX");
if (!$con)
  {
  die('Could not connect: ' . mysql_error());
  }
mysql_select_db("b13_980789_db", $con);
$username = $_SESSION['username'];
$points = mysql_query("SELECT `points` FROM `b13_980789_db`.`users` WHERE `users`.`username` = '$username'");
$pointsTwo = $points + 3;
mysql_query("UPDATE `b13_980789_db`.`users` SET `points` = '$pointsTwo' WHERE `users`.`username` = '$username'");

mysql_close($con);

                 echo "Congratulations.";}
        }
?>

Code (markup):

 

Man!!!! are you gone crazy by giving out your mysql password in a Huge Forum like DP!

 

UPDATE `b13_980789_db` SET `points` = (`points` + 1);

 

Yes,
Try to change your mysql password as soon as possible.

For your problem, check the session variable, and you may shorten your query like this:

"UPDATE `b13_980789_db`.`users` SET `points` = points+3 WHERE `users`.`username` = '$username'"

Code (markup):

 

Thank you very much. I will try out the suggestions.

I have also changed my password ^^.