sqldatabase error : procedure or function has too many parameters specified.

Question

This is the store procedure I have written

alter procedure getFees @rid bigint,@rem bigint out

as

begin

Select @rem=(feetbl.f_total-Sum(feedetailstbl.fd_paid))  From FeeTbl inner join  FeeDetailsTbl  On  feetbl.f_Id = feedetailstbl.f_Id and feetbl.r_id=@rid group by feetbl.f_id,feetbl.f_total 

--print @rem

end

This is my code in c# window

public Int64 getRemFees(Int64 r_id)

        {

            Int64 fee = 0;

            try

            {

                string str = "getRemFees";

                scmd.CommandText = str;

                scmd.CommandType = CommandType.StoredProcedure;

                scmd.Connection = scon;

                SqlParameter rid = new SqlParameter("@rid", r_id);

                SqlParameter re = new SqlParameter("@rem", SqlDbType.BigInt);

                scmd.Parameters.Add(rid);

                scmd.Parameters.Add(re);

                scmd.Parameters["@rem"].Direction = ParameterDirection.Output;

                if (scon.State == ConnectionState.Closed)

                    scon.Open();

sdr=  scmd.ExecuteReader();

                if (sdr.Read())

                    fee = Convert.ToInt64(scmd.Parameters["@rem"].Value);

               

                if (scon.State == ConnectionState.Open)

                    scon.Close();

            }

            catch (Exception ex)

            {

                MessageBox.Show("DataBase Error : " + ex.Message, "Database", MessageBoxButtons.OK, MessageBoxIcon.Error);

            }

            return fee;

        }

When I run above program then It gives me Error : procedure or function  getFees has too many arguments specified.