Form sends from one page but not from another

I have a site that uses a php script in the index page to detect if the user is on a mobile device. If they are, it displays a mobile version of a form they can submit for information. The form will submit successfully from the root but the same form will not send from a subsite in a folder that contains a different index page with the same code in it. Javascript is used in the page to validate fields and control the submit function.

You cannot see the live mobile version form except from a mobile phone. What would you need to troubleshoot this issue?

The form that works is here: abmoving.com
The form that does not work is here: abmoving.com/houston

You can click the CALL ME button without entering any info in and it will show an error in red text at the top of the form on the one that works.
The second one does nothing when you click the sending button.

Here is a section of code used to format the form and to validate and submit the form:

<div id="orcallus">Call Us:</div>
		<div id="ourphone"><a href="tel:7133886284">713-388-6284</a></div>
		<div id="thanks2">Thank you! We will contact you shortly.</div>
		<div id="form2">
				<div id="contactform">Or WE'LL CALL YOU...use our handy  Form</div>
				<div id="error" style="display:none;font-weight:bold;color:red;">Please enter valid information for all fields.</div>
				<div class="mobile_name">Name</div>
				<input id="mobile_name2" type="text" />
				<div class="mobile_phone">Phone</div>
				<input id="mobile_phone2" type="text" />
				<div class="mobile_fromzip">Move from ZIP</div>
				<input id="mobile_fromzip2" type="text" />
				<div class="mobile_tozip">Move to ZIP</div>
				<input id="mobile_tozip2" type="text" />
				<div id="submit_form">CALL ME</div>
		</div>
		<div id="howwehelp1">What We Offer:</div>
		<div id="howwehelp2">
				<div>1. Low Cost, Professional Moving</div>
				<div>2. Packing, Loading, Unloading</div>
				<div>3. Shrink-wrapping all items</div>
				<div>4. To/from storage</div>
				<div>5. Optional after-move cleanup</div>
		</div>
		<div id="services1" style="width:100%;padding:6px 0;font-size:22px;color:#fff; margin:6px 0 6px;">SAME DAY MOVES, TOO!</div>
		<div id="services2" style="width:235px;margin:auto;text-align:left;text-transform:none;line-height:24px;font-size:17px;padding-left:10px;">
				<div></div>
				<div>• Same Day Moves</div>
				<div>• Flat rate moves</div>
				<div>• Home moves</div>
				<div>• Apartment moves</div>
				<div>• Office moves</div>
				<div>• Storage moves</div>
		</div>
		<div class="d-magazine-mobile"><img src="images/D-Mag-Best-Mover-2013.png" width="200" height="269" alt="Best Mover, D Magazine 2013" /></div>
		<a id="mainsite" href="http://abmoving.com/?main=1">Main Site</a> </div>
<script type="text/javascript" language="javascript">
	$(document).ready(function() {
		$('#submit_form').die('click');
		$('#submit_form').click(function() {
			var name = $('#mobile_name2').val();
			var phone = $('#mobile_phone2').val();
			var fromzip = $('#mobile_fromzip2').val();
			var tozip = $('#mobile_tozip2').val();
			if (name.length < 3 || phone.length < 10 || fromzip.length <5 || tozip.length < 5) { 
				$('#error').show();
			} else {
				$.post("mobileform.php", { name:name, phone:phone, fromzip:fromzip, tozip:tozip });
				$('#thanks2').show();
				$('#form2').hide();
				$('#error').hide();
			}
		});
	});
	</script>

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