i am trying to display data on a reportview but it only displays one record

<LocalReport ReportPath="Report1.rdlc">
           <DataSources>
               <rsweb:ReportDataSource DataSourceId="SqlDataSource1" Name="DataSet1" />
           </DataSources>
       </LocalReport>
   </rsweb:ReportViewer>

   <asp:SqlDataSource ID="SqlDataSource1" runat="server"
       ConnectionString="<%$ ConnectionStrings:ApplicationServices %>"
       ProviderName="<%$ ConnectionStrings:ApplicationServices.ProviderName %>"
         SelectCommand="SELECT [Site_ID], [Date_Rep], [Activity], [Product], [Number], [Time]
          FROM [Letters]
          WHERE Site_ID &gt;=@Site AND Date_Rep &lt;=@Date ORDER BY Date_Rep "
       DatasourceMode="DataReader"
       OnSelecting="SqlDataSource1_Selecting">
            <SelectParameters>
       <asp:Parameter Name="Site" Type="String" />
       <asp:Parameter Name="Date" Type="DateTime" />
   </SelectParameters>
   </asp:SqlDataSource>
       <asp:ObjectDataSource ID="ObjectDataSource1" runat="server"
       SelectMethod="GetData"
       TypeName="Securemail_Production.DataSet1TableAdapters.LettersTableAdapter"
       DataObjectTypeName="Securemail_Production.DataSet1+LettersDataTable"
       OldValuesParameterFormatString="original_{0}" UpdateMethod="Update"
       InsertMethod="Insert" >
           <InsertParameters>
               <asp:Parameter Name="Site_ID" Type="String" />
               <asp:Parameter Name="Date_Rep" Type="DateTime" />
               <asp:Parameter Name="Activity" Type="String" />
               <asp:Parameter Name="Product" Type="String" />
               <asp:Parameter Name="Number" Type="String" />
               <asp:Parameter Name="Time" Type="String" />
           </InsertParameters>
        </asp:ObjectDataSource>
       </asp:Content>