Procedure or function getpersonal has too many arguments specified.

Question

This is my Procedure:

create procedure getpersonal  @rid bigint

as

begin

if((select count(1) from personaltbl where r_id=@rid)>0 and (select count(1) from feetbl where r_id=@rid)>0)

select p.s_first,p.s_Middle,p.s_last,c.c_name,o.o_cast from personaltbl p inner join coursetbl c on p.r_id= c.r_id inner join otherdttbl o on p.r_id=o.r_id where p.r_id=@rid

end

Following is my code:

 public ArrayList getpersonaldt(Int64 rid)

{

                ArrayList al = new ArrayList();

            try

            {

                string str = "getpersonal";

                scmd.CommandText = str;

                scmd.CommandType = CommandType.StoredProcedure;

                scmd.Connection = scon;

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

          

                scmd.Parameter.Add(r_id);

                if (scon.State == ConnectionState.Closed)

                    scon.Open();

                SqlDataReader ssdr = scmd.ExecuteReader();

                for (int i = 0; ssdr.Read(); i++)

                {

                    al[i] = ssdr[i];

                }

                if (scon.State == ConnectionState.Open)

                    scon.Close();

            }

            catch (Exception ex)

           {

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

            }

            return al;
}
This code generates error as 
Procedure or function getpersonal has too many arguments specified.