i made it work the way i wanted.
I modify your first script to this
{if $user.enabled}
<script type="text/javascript"><!--{literal}
addLoadEvent(function() {
Nwa_SubmitForm(_form_name,"ID_"+_form_name+"_submit");
});
//-->
{/literal}</script>
{/if}
If you see i added an IF the accoutn enable then run that... if not, it will not run
Cheers
Carlos