Erreur de syntaxe php html

$txtdiff="<p style='color:green;margin:0;padding:0;'>+".$difference."</p>";
}

$req2=mysql_query("SELECT * FROM t_octa where id_octa='".$donnees['id_octa']."'");
$code="<img src=graph.php?id=".$donnees['id_societe']." >";

echo "<TR>
<TD style='font-weight:bold;' id='".$class."'>".ucfirst($donnees['nom_modtaxe'])." </TD>
<TD id='".$class."'>".$donnees['taanneeprec_contact']." </TD>
<TD id='".$class."'>".$donnees['taanneecour_contact']." </TD>
<TD id='".$class."'>".$req2['nom_octa']." </TD>
<TD id='".$class."'><A HREF='lien.html' onMouseOver='poplink('".$code."')'; onmouseout='closepopup()' >".$txtdiff."</A></TD> 
</TR>";