Error : Load Report Failed

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ASP.NET

CrystalReports

, +

My code here ;

private void p_PreviewReport()
       {
           m_rptDoc = new ReportDocument();
           dsCAPEX_Report ds = new dsCAPEX_Report();
           string szRptPath = string.Empty;

           switch (ddlReport.SelectedIndex)
           {
               case 0:
                   m_dt = m_objCAPEXReport.GetCAPEX_DetailProject
                       (txtProjectCode.Text, ddlPeriodYear.SelectedValue, ddlLocationCode.SelectedValue);
                   szRptPath = "~/Report/crCAPEX_DetailProject.rpt";
                   m_dt.TableName = "dtCAPEX_DetailProject";
                   break;
               case 1:
                   m_dt = m_objCAPEXReport.GetCAPEX_SummaryActivity
                       (txtProjectCode.Text, ddlPeriodYear.SelectedValue, ddlLocationCode.SelectedValue);
                   szRptPath = "~/Report/crCAPEX_SummaryActivity.rpt";
                   m_dt.TableName = "dtCAPEX_SummaryActivity";
                   break;
               case 2:
                   m_dt = m_objCAPEXReport.GetCAPEX_SummaryActivityPC
                       (txtProjectCode.Text, ddlPeriodYear.SelectedValue, ddlLocationCode.SelectedValue);
                   szRptPath = "~/Report/crCAPEX_SummaryActivityPC.rpt";
                   m_dt.TableName = "dtCAPEX_SummaryActivityPC";
                   break;
           }

           ds.Tables[m_dt.TableName].Merge(m_dt);
           m_rptDoc.Load(Server.MapPath(szRptPath)); //In Here Error

           m_rptDoc.SetDataSource(ds);

           CrystalReportViewer1.ReportSource = m_rptDoc;
           CrystalReportViewer1.DataBind();

           m_rptDoc.SetParameterValue("szPeriodYear", ddlPeriodYear.SelectedValue);
           m_rptDoc.SetParameterValue("szLocation", ddlLocationCode.SelectedItem.Text);
       }

Okay, thanks before.I have problem when load report. I check the path of report is right and check permission for report is allow access.
Now, i have problem : when i use administrator to access that's report it's work, but when i access use user not administrator any error "Load Report Failed". I see permission for user is allow to access folder report. Someone knows and want to help me, why it's not work for user not administrator?

Urgent.
Thank you