Data list Item command event not firing

Hi can anyone help me.. Why this itemcommand doesn't works properly, when i click the remove button??
 

protected void list_ItemCommand1(object source, DataListCommandEventArgs e)
   {
       try
       {
           if (e.CommandName == "Remove")
           {
               HiddenField id1 = (HiddenField)list.Items[e.Item.ItemIndex].FindControl("hf1");
               if (dbo.deleterecords("image", "id='" + id1.Value + "'") == true)
               {
 
                  
                   lbldel.Text = "Image Deleted";
               }
           }
       }
       catch (Exception ex)
       {
           Exception E = ex;
       }

 

 

<asp:DataList ID="list" runat="server" RepeatColumns="5" ShowFooter="true" ShowHeader="true" Width="98%" OnItemCommand="list_ItemCommand1">
                  <ItemTemplate>
                  <div align="center">
                  <asp:Image ID="img" runat="server" BorderColor="white" BorderWidth="2" Height="100"
                      ImageUrl='<%# "~/Image.aspx?id="+Eval("id") %>' Width="100px"/>
                      <asp:HiddenField ID="hf1" runat="server" Value='<%# Eval("id") %>' />
                      <br />
 
                      <asp:LinkButton ID="linkremove" runat="server" CommandName="Remove" Text="Remove"></asp:LinkButton>
                      </div>
 
                  </ItemTemplate>
 

                  </asp:DataList>

 

I cant remove particular image when i click the remove button..