Wp plugin can't recieve ajax post data

i am trying to develop a wp plugin that will send a variable to my server. So far if i use my code bellow as seperate php file and not within my script works great.. it sends the variables and recieve the results from remote php file.

If i put the same code in my custom wp plugin it doesn't recieve anything.

my code:

<script>
jQuery(document).ready(function(){     
jQuery(".adminpnlnshbutton").click(function(){
var usermail = jQuery('#uemail').val();
var userkey = jQuery('#ukey').val();
var dataString = 'usermail='+ usermail + '&userkey='+ userkey;
$.ajax({
type: "POST",
url: "http://ift.tt/1S0Chtd",
data: dataString,
crossDomain: true,
dataType: 'html',
success: function(data) {
alert (data);
}
});
});
});
</script>

And check php:

$m = $_POST['usermail'];
$k = $_POST['userkey'];
$s = " | ";
echo $m . $s . $k;

As wordpress plugin:

<?
add_action('admin_menu', 'test_plugin_setup_menu');

function test_plugin_setup_menu(){
        add_menu_page( 'Test Plugin Page', 'Tes Plugin', 'manage_options', 'test-plugin', 'test_init' );
}

function test_init(){

if (is_user_logged_in()) { 
?>
<input name="uemail" type="text" id="uemail" value="email" />
<input name="ukey" type="text" id="ukey" value="activation key" />
<div class="adminpnlnshbutton">SEND</div>
<script>
jQuery(document).ready(function(){     
jQuery(".adminpnlnshbutton").click(function(){
var usermail = jQuery('#uemail').val();
var userkey = jQuery('#ukey').val();
var dataString = 'usermail='+ usermail + '&userkey='+ userkey;
$.ajax({
type: "POST",
url: "http://ift.tt/1S0Chtd",
data: dataString,
crossDomain: true,
dataType: 'html',
success: function(data) {
alert (data);
}
});
});
});
</script>
<?
}
}
?>

any idea why i can't recieve the data inside my plugin?

via Chebli Mohamed