jsonp in asp .net

jsonp in asp .net

Hi to all...

i am struck with jsonp. My problem is when i am calling ajax method jquery its not getting in callback method.

For example:
i) i am calling ajax method from 'A' website to 'B' website.
ii) And again calling ajax method from From 'B' website to 'C' website.
But i am getting the values in callback methods.

if i call the ajax method from From 'B' website to 'C' website. i am getting the result in callback method.

A website method
<script type="text/javascript">
        $("#form1").ready(function () {
            
            $.ajax({
                type: 'GET',
                callback: 'callbback_fn',
                contentType: "application/json",
                dataType: 'jsonp'
            })
            
        });


</script>
    
    <script type="text/javascript">
        function callbback_fn() {
            var json = arguments[0];
            var data = '?A=' + json.CustomerCode + '&B=' + json.Flag;
            window.location.href = 'MerchantCeckOutPage.aspx' + data;
        }
    </script>

B website ajax method

function callback_fn() {
            if (arguments.length > 1) {
                if (arguments[0] == true) {
}
}}

Please can anyone help me regarding this issue.