Wcf REST (POST method)cross domain issue on IE

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WCF

Here,I want to call wcfREST webmethod(POST method) url from js function & submit xml data like.."<excelcelldata><assessmentid>205<cellid>4208String content<password>ert1Koiu<username>User5<r_lastdownloadcheckserverdatetime>2012-02-06<xmlinputs>fdgdfg</xmlinputs>"

here,my js function is ..

if ($.browser.msie && window.XDomainRequest) {
             debugger;
            var xdr = new XDomainRequest();
            xdr.open("POST", uel + "RestDemo.svc/UploadExcelCellDataByPost");
            xdr.send('<ExcelCellData ><AssessmentID>205</AssessmentID><CellId>4208</CellId><OutPut>String content</OutPut><Password>ert1Koiu</Password><UserName>User5</UserName><r_LastDownloadCheckServerDateTime>2012-02-06</r_LastDownloadCheckServerDateTime><xmlinputs>fdgdfg</xmlinputs></ExcelCellData>');       
           
            xdr.onerror = function (error) {
              
                alert('in error');
            };
           
            xdr.onload = function () {
                writelog("Loading", _resDiv);
                writelog(xdr.responseText, _resDiv);
            };
        }

But,the above code giving error in IE browser.This is not working in IE.So,please give me solution over it asap...Thanks.