[jQuery] jQuery on Firefox doesn't work with server side redirect

[AndreaDP]

Hi
I'm using jquery 1.3.2 with firefox 3 and IE 6+.

The problem I'm facing is with a call like:
  $("#send").click(function() {
                $.ajax({
                        url: 
"http://localhost:8080/SampleRedirect/api/sample.xml";,
                        type: "GET",
                        dataType: "xml",
                        cache: false,
                        success: function (message) {
                                alert("SUCCESS " + message.xml);
                        },
                        error: function (xhr, status) {
                                alert("ERROR" + status);
                        }
                });
   });

The request is handled on tomcat with a Java EE filter that redirects
to a different server (same host but different port
http://localhost:8081/SampleRedirect/api/sample.xml).

1) On IE the call returns on "success" with the requested file
accessible through the variable "message".

2) On Firefox the call returns on "error" with the error code "302"
redirect.

I need to do the redirection to invoke a server side component that
can't be access directly from the front-end application server due to
cross-domain limitation.
How can I solve the problem on Firefox?
Any help is really appreciated.
Thanks
Andrea