jqueryform plugin problem

jqueryform plugin problem

I am using the jqueryform plugin which works great.

I am having one problem though.  When I access the form on its own it works great, but when I load this form into div with ajax, then it doesn't work.  It loads the form into div, but doesn't insert data into the database, nor return the success content.  This is the form.  I have tried heaps to get it working and really hope someone can help.

<head>
    <script type="text/javascript" src="jquery-1.5.min.js"></script>
    <script type="text/javascript" src="jquery.form.js"></script>
    <script type="text/javascript">
    $(document).ready(function() {
var options = {
    target:     '#successdone',
    url:        'json-echo.php?go=1',
    success:    processJson ,
    clearForm: true
};
function processJson() {
    // 'data' is the json object returned from the server
    alert('hello');
}
// pass options to ajaxForm
$('#myForm').ajaxForm(options);
return false;
});     </script>
   
   
</head>
<body>
<form id="myForm" method="post">
   Persons name: <input type="text" name="persname" value="" />
        mobile: <input type="text" name="mobile" value="" />
                email: <input type="text" name="email" value="" />
    <input type="submit" value="Send" />
</form>
<div id="successdone"></div>
</body>
</html>