arroving documents in asp.net using stroe procedures

i try to approved documents here is code

protected void GrdFileApprove_RowCommand(object sender, GridViewCommandEventArgs e)
        {
            if (e.CommandName == "_Approve")
            {
                //using (SqlConnection con = DataAccess.GetConnected())
                using (SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings["mydms"].ConnectionString))
                {
                    try
                    {
                        int rowindex = Convert.ToInt32(e.CommandArgument);
                        GridViewRow row = (GridViewRow)((Control)e.CommandSource).NamingContainer;
                        LinkButton Prove_Button = (LinkButton)row.FindControl("BtnApprove");
                        SqlCommand cmd = new SqlCommand("spinsertapprove", con);
                        cmd.CommandType = CommandType.StoredProcedure;
                        int result = cmd.ExecuteNonQuery();
                        if (result != 0)
                        {
                            GrdFileApprove.DataBind();
                        }
                    }

                    catch (Exception ex)
                    {                    
                    }
                    finally
                    {
                        con.Close();
                    }
                }
            }

            else if (e.CommandName == "_Reject")
            {
                using (SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings["mydms"].ConnectionString))
                {
                    try
                    {
                        int rowindex = Convert.ToInt32(e.CommandArgument);
                        GridViewRow row = (GridViewRow)((Control)e.CommandSource).NamingContainer;
                        LinkButton Prove_Button = (LinkButton)row.FindControl("Button1");
                        SqlCommand cmd = new SqlCommand("sprejectapprove", con);
                        cmd.CommandType = CommandType.StoredProcedure;
                        int result = cmd.ExecuteNonQuery();
                        if (result != 0)
                        {
                            GrdFileApprove.DataBind();
                        }
                    }

                    catch (Exception ex)
                    {
                    }
                    finally
                    {
                        con.Close();
                    }
                }

here is query

create procedure sprejectapprove
@UserID int,
@DocID int,
@ApproveType nvarchar(50)
as
Insert into Approval(UserID,DocID,ApproveType)
values(@UserID,@DocID,@ApproveType)

create procedure spinsertapprove
@UserID int,
@DocID int,
@ApproveType nvarchar(50)
as
Insert into Approval(UserID,DocID,ApproveType)
values(@UserID,@DocID,@ApproveType)

when i debug the code and click an approve button there is not any responce .....and any data not goes to database
in database i have a seprate approval table in which
userid,docid,approve type columns invlove

please help