Linkbutton problem

Hi
Im unable to fire the button117_click event.

    If reader.HasRows Then                 While reader.Read                                    st = st & "<span>Search by:" & reader(0) & "</span>"                         st = st & "<ul class='scroll-menu'><li><a href='#'>"                         st = st & "<asp:LinkButton ID='LinkButton1'  runat='server' Co ...