Problem with image not show dynamically in Report Viewer 2010

I insert Image conrol on my report take the properties select image sourceExternal and
give the expression in Use this Image --when i write this type code in
=First(Fields!PhotoImagePath.Value,DataSet1)

Show this type error---An error occurred during local report processing.
Report 'Report' contains external images. The EnableExternalImages property has not been set for this report.

and the expression in Use this Image --when i write this type code in
=@~\ImgUpload\+First(Fields!PhotoImagePath.Value, DataSet1)

show the error....this type---The Value expression for the image ‘Image1’ contains an error: [BC30201] Expression expected.

Dear Concerned,
                I want to show image according name of member in table
table view this type...table abc

S.N.   Name   ImageName         PhotoImagePath
1      AAA           DSCN0231.JPG    ~\ImgUpload\baba.JPG
2      BBB           DSCN0230.JPG    ~\ImgUpload\kam.JPG
3      CCC           DSCN0228.JPG    ~\ImgUpload\bla.png

 page code that type code...

          protected void btnShowReport_Click(object sender, EventArgs e)
    {
        try
        {
            int Language;
            string ReportPath, QueryParams, Query, QueryHeader, LanguagePostFlix;

            string MyCulture = Session["MyCulture"].ToString();

            QueryParams = ddlWard.SelectedValue; // +",";
            if (MyCulture == "en-GB")
            {
                Language = 1;
                LanguagePostFlix = "English.rdlc";
            }
            else
            {
                Language = 2;
                //LanguagePostFlix = "Hindi.rdlc";
                LanguagePostFlix = ".rdlc";
            }
            QueryParams += ", " + Language.ToString();

            if (txtHouseNo.Text != string.Empty)
                QueryParams += ",'" + txtHouseNo.Text.Trim() +"'";
            else
                QueryParams += "," + "-1";

            if (txtFamilyHeadName.Text != string.Empty)
                QueryParams += ",'" + txtFamilyHeadName.Text.Trim()+"'";
            //QueryParams += "," + float.Parse(txtFamilyHeadName.Text.Trim());
            else
                QueryParams += "," + "-1";

            QueryHeader = "Exec spGetHeader '" + MyCulture + "'";

            SqlDataAdapter daHeader = new SqlDataAdapter(QueryHeader, strconstring);
            dsPRReport.spGetHeaderDataTable dtHeader = new dsPRReport.spGetHeaderDataTable();
          
            daHeader.Fill(dtHeader);
            Query = "Exec spPRCertificate " + QueryParams;

            SqlDataAdapter da = new SqlDataAdapter(Query, strconstring);
            dsPRReport.spPRReportDataTable dt = new dsPRReport.spPRReportDataTable();

            da.Fill(dt);

            ReportPath = @"Reports\PRCertificate" + LanguagePostFlix;
            ReportViewer1.LocalReport.ReportPath = Server.MapPath(ReportPath);

       
            List<reportparameter> rptPrmtr = new List<reportparameter>();
            rptPrmtr.Add(new ReportParameter("rptPrmtrPRCertificate", ddlWard.SelectedItem.Text.Trim()));
            rptPrmtr.Add(new ReportParameter("rptPrmtrPRCertificate1", Language.ToString()));
            rptPrmtr.Add(new ReportParameter("rptPrmtrPRCertificate2", txtHouseNo.Text.Trim()));
            rptPrmtr.Add(new ReportParameter("rptPrmtrPRCertificate3", txtFamilyHeadName.Text.Trim()));
           
            //rptPrmtr.Add(new ReportParameter("rptImage" ));

          
            //rptPrmtr.Add(new ReportParameter("PhotoImagePath", Request.Url.AbsoluteUri.Replace(Request.Url.AbsolutePath, "") + @"~/ImgUpload/"));
       
            ReportDataSource crds = new ReportDataSource("DataSet1", (DataTable)dt);
            ReportDataSource crdsHeader = new ReportDataSource("DataSet2", (DataTable)dtHeader);

            ReportViewer1.LocalReport.DataSources.Clear();

            ReportViewer1.LocalReport.DataSources.Add(crds);
            ReportViewer1.LocalReport.DataSources.Add(crdsHeader);
            ReportViewer1.LocalReport.SetParameters(rptPrmtr);

            ReportViewer1.LocalReport.EnableExternalImages = true;
            ReportViewer1.ZoomMode = ZoomMode.Percent;



            ReportViewer1.LocalReport.Refresh();
        }

        catch (Exception ex) { lblMessage.Text = ex.Message; lblMessage.Visible = true; }





    }</reportparameter></reportparameter>