I'm having a miserable time debugging one small function on my new project.

Essentially I'm having a user log out via an AJAX call to my log out script on my server called "userfFunctions.php" I'm using AJAX so that I don't have the headache of writing more regex to match my mod_rewrites. Anyway, every so often, it seems as though my Post data just flat out dies and since the PHP is running behind the scenes, I feel like I have no way of finding out where the data flow is being disrupted. BTW This function works 19 hrs of the day.

Here is the javascript function:

function logOut(){
    var data = new Object;
    data.log_out = true;
    $.ajax({
        type: 'POST',
        url: 'http://www.mydomain.com/User_Validator', //<-- redirects to userFunctions.php
        data: data,
        success: function(data) {
        alert(data); // <-- a response is triggered but with no response data!
        }
    });
}

the php side:

if(isset($_POST['log_out'])){
     echo 'alert this!';
}

here is my awesome response: