DataSource Controls :: Multi Insert Query Using Scope_identity Not Working

I'm trying to create multi insert query in single stored procedure along with scope_identity variable. while execute the aspx page getting error "Procedure 'sp_seller_ins' expects parameter'@new1', which was not supplied." I have created stored procedure:

set ANSI_NULLS ON
set QUOTED_IDENTIFIER ON
GO
ALTER PROCEDURE [dbo].[sp_seller_ins]
@txt_n_properity VARCHAR(50),
@txt_t_properity VARCHAR(50),
@txt_prop_for VARCHAR(50),
@txt_flat_no VARCHAR(50),
@txt_loc_country VARCHAR(50),
@txt_loc_state VARCHAR(50),
@txt_loc_district VARCHAR(50),
@txt_loc_town VARCHAR(50),
@txt_loc_area VARCHAR(50),
@txt_loc_locality VARCHAR(50)
AS
BEGIN
declare @new1 int
declare @new2 int
INSERT INTO dbo.sel_pro_details( nature_property, type_property, property_for, flat_no) VALUES ( @txt_n_properity, @txt_t_properity, @txt_prop_for, @txt_flat_no);
set @new1 = scope_identity()
INSERT INTO dbo.sel_loc_details( country, state, district, town, area, locality, pro_details_id) VALUES (@txt_loc_country, @txt_loc_state, @txt_loc_district, @txt_loc_town, @txt_loc_area, @txt_loc_locality, @new1);
set @new2 = scope_identity()
end
code behind aspx page
sqlconn mySql = new sqlconn();
mySql.CreateConn();
mySql.Command = mySql.Connection.CreateCommand();
mySql.Command.CommandType = System.Data.CommandType.StoredProcedure;
mySql.Command.CommandText = "sp_seller_ins";
mySql.Command.Parameters.Add("@txt_n_properity", SqlDbType.VarChar);
mySql.Command.Parameters["@txt_n_properity"].Value = txt_n_properity.Text;
mySql.Command.Parameters.Add("@txt_t_properity", SqlDbType.VarChar);
mySql.Command.Parameters["@txt_t_properity"].Value = txt_t_properity.Text;
mySql.Command.Parameters.Add("@txt_prop_for", SqlDbType.VarChar);
mySql.Command.Parameters["@txt_prop_for"].Value = txt_prop_for.Text;
mySql.Command.Parameters.Add("@txt_flat_no", SqlDbType.VarChar);
mySql.Command.Parameters["@txt_flat_no"].Value = txt_flat_no.Text;
mySql.Command.Parameters.Add("@txt_loc_country", SqlDbType.VarChar);
mySql.Command.Parameters["@txt_loc_country"].Value = txt_loc_country.Text;
mySql.Command.Parameters.Add("@txt_loc_state", SqlDbType.VarChar);
mySql.Command.Parameters["@txt_loc_state"].Value = txt_loc_state.Text;
mySql.Command.Parameters.Add("@txt_loc_district", SqlDbType.VarChar);
mySql.Command.Parameters["@txt_loc_district"].Value = txt_loc_district.Text;
mySql.Command.Parameters.Add("@txt_loc_town", SqlDbType.VarChar);
mySql.Command.Parameters["@txt_loc_town"].Value =txt_loc_town.Text;
mySql.Command.Parameters.Add("@txt_loc_area", SqlDbType.VarChar);
mySql.Command.Parameters["@txt_loc_area"].Value =txt_loc_area.Text;
mySql.Command.Parameters.Add("@txt_loc_locality", SqlDbType.VarChar);
mySql.Command.Parameters["@txt_loc_locality"].Value =txt_loc_locality.Text;
mySql.Command.ExecuteNonQuery();
mySql.Command.Dispose();
mySql.Connection.Close();
mySql.CloseConn();