AspxDocumentViewer XtraReport and empty data

Question

I'm using XtraReport and AspxDocumentViewer. I wrote those codes to show. But I'm always taking some problem; empty data.

How to fix this? I can't see what's wrong.

By the way "dsMast", it's dataset and there are ten rows. But still the report is empty.

string fpth = Server.MapPath(".");
fpth = fpth + "\\report\\rprFtrLst22222.repx";
XtraReport report = XtraReport.FromFile(fpth, true);
report.DataSource = dsMast;
report.LoadLayout(fpth);
report.CreateDocument();
string reportName = (string)"report";
ASPxDocumentViewer1.Report = report;
ASPxDocumentViewer1.DataBind();
Session["ReportName"] = reportName;

Answer 1

I fixed my problem. First of all, I added some code for page_load

        if (Session["report2"] != null)
        {
            ASPxDocumentViewer1.Report = Session["report2"] as XtraReport;
        }

And then I used thoso codes.

        report.DataSource = dsMast;
        report.LoadLayout(fpth);
        report.CreateDocument();
        ASPxDocumentViewer1.Report = report;
        ASPxDocumentViewer1.DataBind();
        Session["report2"] = report;