view file contents after fetching from database, not working

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VB

ASP.NET

File-Upload

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i have a updates panels in my page which is a must.
the fileupload works fine with PostBackTrigger, but when i try retrieve the file from database, i am not able to do so with the update panel arroutnd.

the code snippet illstrated my exact piont of problem

<asp:AccordionPane ID="AccordionPane_TC_document_upload" runat="server" Enabled="true">
                           <Header>
                               Stage 2A : T&C document upload</Header>
                           <Content>
                               <asp:UpdatePanel ID="UpdatePanel_TC_document_upload" runat="server" UpdateMode="Always">                                    <ContentTemplate>
                                       <asp:Panel ID="Panel_TC_document_upload" ScrollBars="None" runat="server" Width="100%"
                                           Enabled="false">
                                           <p>
                                               <br />
                                               <table align="center">
                                                   <tr>
                                                       <td>
                                                           <asp:Label ID="lbl_TC_document_upload" runat="server" Text="Terms and Conditions document :  "></asp:Label>
                                                           <td>
                                                              <asp:FileUpload ID="fu_TC_document_upload" runat="server" />
                                                              <asp:LinkButton ID="lnk_btn_TC_filename" runat="server" Font-Bold="true" ForeColor="Blue" OnClick="TC_retrieve_file" ></asp:LinkButton>
                                                                    
                                                              <asp:Button ID="lnk_btn_TC_file_delete" runat="server"  OnClick="TC_delete_file" text ="Delete File" ></asp:Button>
                                                              <%--<asp:Label ID="fu_fileName" runat="server" Font-Bold="true" ForeColor="Blue"></asp:Label>--%><br />
                                                           </td>
                                                           <tr>
                                                               <td>
                                                                   <asp:Label ID="lbl_remarks" runat="server" Text="Remarks : "></asp:Label>
                                                               </td>
                                                               <td>
                                                                   <asp:TextBox ID="txt_remarks" runat="server" MaxLength="500"></asp:TextBox>
                                                               </td>
                                                           </tr>
                                               </table>
                                               <table align="center">
                                                   <tr>
                                                       <td>
                                                           <asp:Button ID="btn_save_TC_document_upload" Text="Save" runat="server" align="left">
                                                           </asp:Button>
                                                       </td>
                                                       <td>
                                                                         
                                                       </td>
                                                       <td>
                                                           <asp:Button ID="btn_save_send_TC_document_upload" Text="Save & Send" runat="server"
                                                               align="right"></asp:Button>
                                                       </td>
                                                   </tr>
                                               </table>
                                           </p>
                                           <p class="style1" align="left">
                                               Signed  By: <asp:Label ID="lbl_signby_TC_document_upload" runat="server"
                                                   Text="" ForeColor="Black"></asp:Label>                                                  
                                               Signed On:<asp:Label ID="lbl_signon_TC_document_upload" runat="server" Text="" ForeColor="Black"></asp:Label></p>
                                       </asp:Panel>
                                  </ContentTemplate>
                                   <Triggers>
                                       <asp:PostBackTrigger ControlID="btn_save_TC_document_upload" />
                                   </Triggers>
                                   <Triggers>
                                       <asp:PostBackTrigger ControlID="btn_save_send_TC_document_upload" />
                                   </Triggers>
                              </asp:UpdatePanel>
                           </Content>
                       </asp:AccordionPane>

please suggest a suitable soln..
thanks in advance.