asp.net - How to Upload Video in database using C#.net in Visual studio 2008 -

i have below code upload video files database when upload video , click on upload button webpage go offline , data not store data base happening don't know.

my database table is

create table [dbo].[tblvideos]( [id] [int] identity(1,1) not null, [video_name] [varbinary](50) null, [name] [varchar](50) null, [contenttype] [varbinary](50) null, [data] [varbinary](max) null ) on [primary] 

my aspx code

<table style="margin-left:150px; height:546px">       <tr class="tr">           <td colspan="3">               <asp:label id="label1" runat="server"                    font-size="15pt" forecolor="#0099ff" text="add new video"></asp:label>               &nbsp;<br />               <asp:label id="label2" runat="server" font-names="ms reference sans serif"                  font-size="7pt" text="make sure video in mp4 format"></asp:label>           </td>        </tr>       <tr class="tr">        <td class="style1"> video name&nbsp; :</td>        <td><asp:textbox id="txtideoname"  height="24px" width="270px" runat="server"></asp:textbox></td>         <td>           &nbsp;</td>       </tr>       <tr class="tr">        <td class="style1">video type :</td>        <td><asp:textbox id="txtvideotype"  height="24px" width="270px" runat="server"></asp:textbox></td>         <td>           &nbsp;</td>       </tr>        <tr class="tr">        <td  class="style1">video:</td>        <td>          <asp:fileupload id="fileupload1" runat="server" /></td>         <td>           &nbsp;</td>       </tr>       <tr class="tr">        <td>&nbsp;</td>        <td><asp:button id="btnupload" runat="server" text="upload" width="132px" height="34px" backcolor="red" borderstyle="none" font-bold="true" forecolor="white" onclick="btnupload_click"/><br />            <asp:label id="lblmsg" runat="server"/></td>         <td>           &nbsp;</td>       </tr>       <tr class="tr">           <td>               &nbsp;</td>           <td>               &nbsp;</td>           <td>             &nbsp;</td>       </tr>   </table>    c# code  using (binaryreader br = new binaryreader(fileupload1.postedfile.inputstream))         {             byte[] bytes = br.readbytes((int)fileupload1.postedfile.inputstream.length);             string strconnstring = configurationmanager.connectionstrings["con1"].connectionstring;             using (sqlconnection con = new sqlconnection(strconnstring))             {                 using (sqlcommand cmd = new sqlcommand())                 {                     cmd.commandtext = "insert tblvideos(video_name,name, contenttype, data) values (@video_name,@name, @contenttype, @data)";                     cmd.parameters.addwithvalue("@video_name", txtideoname.text);                      cmd.parameters.addwithvalue("@name", path.getfilename(fileupload1.postedfile.filename));                     cmd.parameters.addwithvalue("@contenttype", "video/mp4");                     cmd.parameters.addwithvalue("@data", bytes);                     cmd.connection = con;                     con.open();                     cmd.executenonquery();                     con.close();                 }             }         } 

one potential problem both video_name , contenttype being stored varbinary, , don't seem cast in sql. have tried changed them varchar?