Phpbb affichage avatar

Bonjour,

J'essaye de faire apparaître sur ma page d'accueil les derniers sujets postés sur mon forum phpbb, ainsi que l'avatar de la personne qui a posté le topic.

Tout marche bien excepté que j'ai une crois rouge qui apparait à la place de l'avatar..

Voici mon code:


<?php

mysql_connect("server", "user", "pass") or die;
mysql_select_db("db");

$recent = mysql_query("SELECT * FROM phpbb_posts ORDER BY post_time DESC LIMIT 10");

while ($recent_row = mysql_fetch_assoc($recent))
{
$post_id = $recent_row ['post_id'];
$topic_id = $recent_row ['topic_id'];
$forum_id = $recent_row ['forum_id'];
$poster_id = $recent_row ['poster_id'];
$post_time = $recent_row ['post_time'];
$user_avatar = 'download/file.php?avatar=' . $recent_row['user_avatar'];


$user_avatar = mysql_query("SELECT user_avatar FROM phpbb_users WHERE user_id='$poster_id'");
$user_avatar = mysql_fetch_assoc($user_avatar);
$user_avatar = $user_avatar['user_avatar'];


$topic_name = mysql_query ("SELECT topic_title FROM phpbb_topics WHERE topic_id = '$topic_id'");
$topic_name = mysql_fetch_assoc ($topic_name);
$topic_name = $topic_name ['topic_title'];

$username = mysql_query("SELECT username FROM phpbb_users WHERE user_id='$poster_id'");
$username = mysql_fetch_assoc($username);
$username = $username['username'];


echo "<img src='$user_avatar'> <a href='http://www.monsite.com/forum/memberlist.php?mode=viewprofile&u=$poster_id'>$username</a>\" posted in \"<a href= 'http://www.monsite.com/forum/viewtopic.php?$forum_id=7&t=$topic_id'>$topic_name</a>\"<br />";



}

?>


Quelqu'un pourrait m'aider à corriger le problème?

Merci pour votre aider.