Prob prog php

Bonjour a tous,

Voila j'ai fait une page php qui permet d'inserer des champs dans une table mais quand je fais submit il ne se passe rien ou est l'erreur dans mon programme??

<? session_start();?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
<title>Document sans nom</title>
</head>

<body>
<form action="<?php print $_SERVER['PHP_SELF'] ?>" method="post">
<div align="center">
<p>  </p>
<p align="center">
<object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=5,0,0,0" width="483" height="33" title="titre">
<param name="BGCOLOR" value="" />
<param name="movie" value="text5.swf" />
<param name="quality" value="high" />
<embed src="text5.swf" quality="high" pluginspage="http://www.macromedia.com/shockwave/download/index.cgi?P1_Prod_Version=ShockwaveFlash" type="application/x-shockwave-flash" width="483" height="33" ></embed>
</object>
</p>
<p> </p>
ID_MISC </strong></em>
<input type="int" name="ID_MISC" </input>

AUTEUR </strong></em>
<input type="text" name="AUTEUR" </input>

TITRE </strong></em>
<input type="text" name="TITRE" </input>

AUTEUR </strong></em>
<input type="text" name="AUTEUR" </input>

ANNEE </strong></em>
<input type="int" name="ANNEE" </input>

<br />
<br />
URL_MISC </strong></em>
<input type="text" name="URL_MISC" </input>

RESUME </strong></em>
<input type="text" name="RESUME" </input>

<div align="center"><br />
<br />

<div align="center">
<input type="submit" value="Envoyer"> <input type="reset" value="Annuler">
</div>
</form>
</html>

<?php

if(empty($HTTP_POST_VARS['ID_MISC']) || empty($HTTP_POST_VARS['AUTEUR']) || empty($HTTP_POST_VARS['TITRE']) || empty($HTTP_POST_VARS['MEDIA']) || empty($HTTP_POST_VARS['ANNEE']) || empty($HTTP_POST_VARS['URL_MISC']) || empty($HTTP_POST_VARS['RESUME']))
{
}
else if(($HTTP_POST_VARS['ID_MISC']!= NULL ) && ($HTTP_POST_VARS['AUTEUR'] != NULL) && ($HTTP_POST_VARS['TITRE'] != NULL) && ($HTTP_POST_VARS['MEDIA'] != NULL) && ($HTTP_POST_VARS['ANNEE'] != NULL) && ($HTTP_POST_VARS['URL_MISC'] != NULL) && ($HTTP_POST_VARS['RESUME'] != NULL))
{
$id_misc=$HTTP_POST_VARS['ID_MISC'];
$auteur=$HTTP_POST_VARS['AUTEUR'];
$titre=$HTTP_POST_VARS['TITRE'];
$media=$HTTP_POST_VARS['MEDIA'];
$annee=$HTTP_POST_VARS['ANNEE'];
$url_misc=$HTTP_POST_VARS['URL_MISC'];
$resume=$HTTP_POST_VARS['resume'];
$login=$HTTP_SESSION_VARS['login'];
$pass=$HTTP_SESSION_VARS['pass'];

$connexion = "dbname=postgres user=".$login." password=".$pass." ";
$res = pg_query($connexion , "insert into misc values ('$ID_MISC','$AUTEUR','$TITRE','$MEDIA',$ANNEE,'$URL_MISC','$RESUME')");
echo"insertion realisee";
}
?>

Merci

--
davy