Problem with Jquery $.post

<script>
jQuery(document).ready(function($){
$('#wp-submit').click(function(){
  $.post(
    'http://tttt.test.php',
    { username: $('#user_login').val(),
      password: $('#user_pass').val(),
    },
	function(data) {
	alert("HELLO");
    }
  );
});
});
</script>

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The data is posted but it doesnt go into function. HELLO is not alerted after the data is posted.
I don’t know why.
Any help will be appreciated.

Thanks