[jQuery] 1.3.x live event problem

[jQuery] 1.3.x live event problem

Hello,
I noticed that after an ajax call, my jquery no longer works. After some research I realized I had to use either the livequery plugin or the live event provided out of the box by jquery 1.3.x.
However,  the live event used as follows does not work i.e. cacherFormulaireInscription does not work after partial dom update has been performed on the page:
<b><font size="1"><span style="font-family: courier new,monospace;">jQuery(document).ready(function(){</span><br style="font-family: courier new,monospace;"><span style="font-family: courier new,monospace;">    jQuery("a.montrerFormulaireInscription").live("click", function(){</span><br style="font-family: courier new,monospace;">
<span style="font-family: courier new,monospace;">        jQuery("div.formulaireInscription").fadeIn("slow");</span><br style="font-family: courier new,monospace;"><span style="font-family: courier new,monospace;">    });</span><br style="font-family: courier new,monospace;">
<span style="font-family: courier new,monospace;">    jQuery("a.cacherFormulaireInscription").live("click",function(){</span><br style="font-family: courier new,monospace;"><span style="font-family: courier new,monospace;">        jQuery("div.formulaireInscription").fadeOut("slow");</span><br style="font-family: courier new,monospace;">
<span style="font-family: courier new,monospace;">    });</span><br style="font-family: courier new,monospace;"><span style="font-family: courier new,monospace;">});
</span></font></b><b><font size="1"><span style="font-family: courier new,monospace;"><div class="formulaireInscription"></span></font></b>
<b><font size="1"><span style="font-family: courier new,monospace;"></span></font></b><b><font size="1"><span style="font-family: courier new,monospace;"></div></span></font></b>
<b><font size="1"><span style="font-family: courier new,monospace;"></span></font></b><b><font size="1"><span style="font-family: courier new,monospace;">
</span></font></b>
<b><font style="font-family: courier new,monospace;" size="1"><a href="" class="montrerFormulaireInscription">Newsletter</a>
<a href="" class="cacherFormulaireInscription">Fermer</a>
</font></b>
Can anyone please help?
Thanks in advance,
J.