$.ajax & post data - can not solve for a few days...

$.ajax & post data - can not solve for a few days...

I have really simply code:

  1. <script type="text/javascript">

  3.  function check(v)
  4.   {
  5.    if(v!='')
  6.     {
  7.      $.ajax({
  8.        type: "POST",
  9.        url: "test.php",
  10.        data: { test : "123" },
  11.        dataType: "text",
  12.        error: function(textStatus, errorThrown)
  13.         {
  14.          alert(textStatus+", "+errorThrown);
  15.         },
  16.        success:  function(data)
  17.         {
  18.          alert(data);
  19.         }
  20.       })
  21.     }
  22.   }

  24. </script>

and PHP:

  1.   <?php

  3.    echo $_POST['test'];

  5.    exit;
  6.    
  7.   ?>

Everything works fine on IE (8 & 6), Firefox Chrome, on my local computer (Windows, Apache 2.2.9, PHP 5.2.6).
But on the remote server (Linux, Apache 2.2.3, PHP 5.1.6) doesn't work on IE (both 8 and 6). Error hander (which you can see in the code) returns:  parseerror, [object Error]. On Firefox & Chrome it's working OK... :/

I can't manage with that for a few days. Thanks for any help!