mySQL stored procedure with .NET connector problem

Question

I've seen other topics that deal with this error but none that seem to correspond to my situation.

First of all, my code works completely fine when i run it locally.

But when i upload it to the server, i get the error:

Parameter '?PuserName' not found in the collection.

Here is the C# code:

public DataSet GetEmployeeByUsername(string username)
        {
            string proc = "schema.GetEmployeeByUsername";
            MySqlParameter[] args = new MySqlParameter[1];
            args[0] = new MySqlParameter("?PuserName", MySqlDbType.VarChar);
            args[0].Value = username;
            return SQLDatasetCall(args, proc);
        }

 protected DataSet SQLDatasetCall(MySqlParameter[] sqlparams, string call)
        {
            string myConString = ConfigurationManager.AppSettings["mySql"];
            MySqlConnection MyConnection = new MySqlConnection(myConString);
            MySqlDataAdapter adapter = new MySqlDataAdapter();
            MyConnection.Open();
            MySqlCommand command = new MySqlCommand(call, MyConnection);
            command.CommandType = CommandType.StoredProcedure;
            if (sqlparams != null)
            {
                foreach (MySqlParameter param in sqlparams)
                {
                    command.Parameters.Add(param);
                }
            }
            DataSet ds = new DataSet();
            adapter.SelectCommand = command;
            adapter.Fill(ds);
            adapter.Dispose();
            MyConnection.Close();
            return ds;
        }

SQL code:

delimiter |
create procedure GetEmployeeByUsername(in PuserName varchar(45))
begin
  select id,
      firstName,
      lastName,
      phone,
      address1,
      address2,
      city,
      state,
      zip,
      username,
      password,
      emptypeid
  from schema.tblemployees
  where
      username=PuserName;
end |
delimiter;

Answer 1

turned out microsoft Visual Web Developer wasn't correctly ftp-ing my files during the "publish" method. i downloaded filezilla and ftp-ed the files again and it worked....