JQuery success callback isn't being called or?

I have searched a lot of threads but i can't find any answer that suits me. Now I will try to explain my problem.

I have a simple jQuery script that does a little ajax request. its simple like this:

print("

<script>

    function buscaCaracteristicas(idTotalizador){  

        var target = '../../ajax/doSomeSearch.php';

        $.ajax({

            url: target,                 

            //dataType: 'html',

            dataType: 'text',

            type: 'POST',

            success: function(msg){

                alert(msg);

            }

        });

    }

</script>

");

And the PHP page does this:

<?php

    $ret = "<p>hello world</p>";

    exit($ret);

?>

I have tried putting the return data on an HTML element via $.html(msg) too. Problem is: alert or the $.html() on callback NEVER fires although on firebug I can check the request has the return code 200 OK.

Notice that the function code is wrapped into a PHP print("") command and the return dataType is HTML which is what I really need to get (can't use JSON).

Any miraculous advice? Thanks in advance.

Solved: changing dataType to 'text' according to Splash-X advices it worked.