[jQuery] jQuery form plugin?

I am new to jQuery and really new to the form plugin so I must be
missing something simple but I can't figure out what is wrong.

I have this form:

<div class="print">
<h3>Print Items Due Report</h3>
<form id="printForm" action="printRange.php" method="post">
Date to Print<br />
<input type="text" name="dueDateWest" id="dueDateWest" />
<input type="submit" name="printItems" id="printItems" value="" />
</form>

If I put this in the ready function: $('#printForm').ajaxForm();

Firebug shows show a response and post that seem correct, but
printRenge.php does not format a page to print.

If I put anything in front of #printForm like this:
$('XX#printForm).ajaxForm() firebug says "reload to activate window
console" and printRange.php formats a page.

Can anyone tell me what I am doing wrong?

Thanks, Jim