error

<?
require "db.php";
$id+=0;
$nacti=mysql_query("SELECT jmeno, nazev, datum, img, obsah FROM clanky WHERE id=$id");
if(!$nacti):
  echo "došlo k poruše v komunikaci s databází";
  MySQL_Close($spojeni);
  die();
endif;
$zaznam=mysql_fetch_array($nacti);
$id=$zaznam["id"];
$jmeno=$zaznam["jmeno"];
$nazev=$zaznam["nazev"];
$datum=$zaznam["datum"];
$img=$zaznam["img"];
$obsah=$zaznam["obsah"];
{$Pocet++; echo "<h1 class='decay'>$nazev</h1><div class='descr'>$datum od $jmeno</div><img src='$img' width='120' height='90' alt='sample image' class='left border' />$obsah";}
?>
<?
$nacti2=mysql_query("SELECT id, jmeno, email, datum, icq, obsah, idclanku FROM komentare WHERE idclanku=$id");
if(!$nacti):
  echo "došlo k poruše v komunikaci s databází, nelze načíst komentáře";
  MySQL_Close($spojeni);
  die();
endif;
$zaznam2=mysql_fetch_array($nacti2); // tady mi to hazi ten error
$jmenokoment=$zaznam2["jmeno"];
$email=$zaznam2["email"];
$datumkoment=$zaznam2["datum"];
$obsahkoment=$zaznam2["obsah"];
echo "$jmenokoment, $email, $datumkoment, $obsahkoment";
                echo "<script type=\"text/javascript\"> 
<!-- 
function area(text) {
        var txtarea = document.post.zprava;
        text = '' + text + '';
        if (txtarea.createTextRange && txtarea.caretPos) {
                var caretPos = txtarea.caretPos;
                caretPos.text = caretPos.text.charAt(caretPos.text.length - 1) == ' ' ? caretPos.text + text + ' ' : caretPos.text + text;
                txtarea.focus();
        } else {
                txtarea.value  += text;
                txtarea.focus();
        }
}
// -->
</script>\n";
?>
<div id="komentare">
<form action="koment_zpracuj.php" method="post">
<input type="hidden" name="sent" value=""/>
<input type="hidden" name="datum" value=""/>
<input type="hidden" name="ip" value=""/>
<input type="hidden" name="idclanku" value="<? echo "$id" ?>"/>
  Jméno:<br><input type="text" name="nazev" value="" maxlength="64"><br>
  Email:<br><input type="text" name="nazev" value="" maxlength="64"><br>
  Icq:<br><input type="text" name="nazev" value="" maxlength="10"><br>
  Komentář (max 10000 znaku)<br>
  
<textarea name="koment" rows="7" cols="80" style="width: 70% onselect="storeCaret(this);" onclick="storeCaret(this);" onkeyup="storeCaret(this);"></textarea>
<br>

<br>
<br>
	<input type="submit" class="submit" name="save" style="width: 60px" value="Submit">
	<input type="reset" class="submit" name="reset" style="width: 60px" value="Reset">
</form>
</div>