Hey everyone. This is my first post here, so I hope I'm doing it appropriately.

I have several jQuery $.post calls that work just fine. They send data to a PHP script that modifies a database and returns some data. No problem.

But this one doesn't work. The returned data is just NULL.

$.post("act_addTaskLog.php",
 {description: $("#logFormDescription").val(), complete: $("#logFormComplete").is(':checked'), taskId: $("#logFormTaskId").val(), user: <?php echo $_SESSION['user']; ?>},
 function(data) {
  alert("data: " + data);
 }
);

I've tried everything I can think of, to no avail. I've even tried just one line in my PHP script:

die("true");

Firebug shows that the script is being executed, but it's not completing. The alert message displays just with the label "data:" in it, no actual data.

Thanks in advance for your help!