AJAX post returning 500 Internal Server Error on Live Server

[logicslab]

I created a script where a user can select from a variety of

 

shipping options for an order from within a jQuery dialog box.  The

 

shipping rates are delivered via UPS & FedEx.  Oddly enough, the

 

script works fine on my development machine, but on the live server,

 

Firebug returns a "500 Internal Server Error"

 

Here is what my jQuery looks like:

 

jQuery("#select-shipping").click(function(){

// Open the dialog, start with the "loading page"

 

 

$("#shipping-select").load('func/shipping_load.php').dialog({

bgiframe: true,

autoOpen: true,

position: 'center',

title: 'Select Shipping Method',

width: 400,

height: 400,

modal: true,

buttons: {

'Apply Shipping': function() {

var bValid = true;

 

if (bValid) {

var fship =

 

$('input[name=shipping]:checked').val();

var arr =

 

fship.split('-');

var shipPrice =

 

arr[1];

var shipMeth =

 

arr[0];

 

var subOrder =

 

$("#d_total").val();

if

 

($('#customer-discount').val() != 'false') {

var minDis =

 

subOrder * ("."+$("#customer-discount").val());

var nTotal =

 

subOrder - minDis;

 

var orderTotal

 

= nTotal + parseFloat(shipPrice) + parseFloat($("#tax").val());  /*

 

Order Total minus customer discount */

 

 

 

$("#order_discount_amount").val("-"+minDis.toFixed(2));

}

else {

var orderTotal

 

= parseFloat(subOrder) + parseFloat(shipPrice) +

 

parseFloat($("#tax").val()); /* Order Total, No Discount */

}

 

 

$("#order_total").val(orderTotal.toFixed(2)),

 

 

$("#shipcost").val(parseFloat(shipPrice)),

 

 

$("#shipping_method").html(shipMeth);

 

 

 

$(this).dialog("destroy");

}

},

'Close Window': function() {

$(this).dialog("destroy");

 

}

},

close: function() {

$(this).dialog("destroy");

}

});

 

// This portion actually runs the PHP code to get the

 

rate results from UPS & FedEx

$.ajax({

  type: "POST",

  url: "func/shipping_selection.php",

data: "shipid=" + $("#customer-ship-id").val()

 

+ "&cartid=" + $("#cart_id").val(),

success: function(html){

$('#sLoader').fadeOut("fast");

$("#sLookup").html(html);

}

});

 

});

 

 

The dialog opens a loader page (with gif) and that portion works fine.

 

Once the AJAX post is complete (shipping_selection.php), it is

 

supposed to update the "sLookup" div with the HTML from the

 

shipping_selection.php page.  Like I said, it works perfectly on my

 

testing server, but fails on the live server.  Both are running PHP

 

5.2xxxx.

 

Also, notice in the attached images that the 'shipping_selection.php'

 

is actually working...rate results are returned from both UPS and

 

FedEx, however something is failing on the AJAX success function.

 

[attachment deleted by admin]