jQuery返回码

Got a problem with jquery. I cant get a .xml file from the server, using the ajax function in jquery. I tried to call an alert upon succes and upon error, but nothing triggers. I did it this way:

$.ajax({
    type: "GET",
    url: "Levels.xml",
    dataType: "xml",
    error: function(){

        alert("Ajax failed!");

    },
    success: function(xml){
              alert(xml);

            }
    });

That did not work. Edit: I have this code in my xml file:

<?xmlversion="1.0" encoding="ISO-8859-1"?>
<Level id="TestLevel" theme="woods">
       <Wall>
    <Row>111111111111111111111</Row>
    <Row>100000000000000000001</Row>
    <Row>100000000000000000001</Row>
    <Row>100000000000000000001</Row>
    <Row>100000000000000000001</Row>
    <Row>100000000000000000001</Row>
    <Row>100000000000000000001</Row>
    <Row>100000000000000000001</Row>
    <Row>100000000000000000001</Row>
    <Row>100000000000000000001</Row>
    <Row>100000000000000000001</Row>
    <Row>111111111111111111111</Row>
    </Wall>
     </Level>

Renaming the XML File to something else like "sites.xml" fixes this on my server.

Appears that "levels" is somehow related to the xml request by ajax.

cheers

PrimuS