Jquery 调用 webservice报错,哪位高手帮下忙, 多谢了

Jquery 调用 webservice报错,谁帮下忙, 谢谢了。
<%@ Page Language="C#" AutoEventWireup="true" ValidateRequest="false" CodeBehind="WebForm1.aspx.cs" Inherits="ApprovalPortal.WebForm1" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
        <script type="text/javascript" src="Scripts/jquery-1.4.1.min.js"></script>
    <script type="text/javascript" src="Scripts/jquery-1.4.1-vsdoc.js"></script>
    <script type="text/javascript" src="Scripts/jquery-1.4.1.js"></script>
      <script type="text/javascript">
          $(document).ready(function () {
              $("#btnLogin").click(function (event) {
                  var wsUrl = "http://meit-mei01/ApprovalPortal/ApprovalPortalWebService.asmx?op=GetPublicUserInfo";
                  var soapRequest =
                    '<?xml version="1.0" encoding="utf-8"?> \
                    <soap12:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" \
                        xmlns:xsd="http://www.w3.org/2001/XMLSchema" \
                        xmlns:soap12="http://www.w3.org/2003/05/soap-envelope"> \
                      <soap12:Body> \
                        <GetPublicUserInfo xmlns="http://tempuri.org/"> \
                        <userName>' + $("#txtUserName").val() + '</userName>\
                    <passWord>' + $("#txtPassword").val() + '</passWord>\
                        </GetPublicUserInfo> \
                      </soap12:Body> \
                    </soap12:Envelope>';

                  $.ajax({
                      type: "GET",
                      url: wsUrl,
                      contentType: "text/xml",
                      dataType: "xml",
                      data: soapRequest,
                      success: processSuccess,
                      error: processError
                  });

              });
          });

          function processSuccess(data, status, req) {
              if (status == "success")
                  $("#response").text($(req.responseXML).find("HelloResult").text());
          }

          function processError(data, status, req) {
              alert(req.responseText + " " + status);