WHERE failed to associate a column to query in a view

I'm passing some parameters to a view where I need to get the return of this query. When defining the filters in the Where of my query, the query return reports the following error:

  

Invalid 'competition' column name.

I know it's my coding failure, but I declare in my where columns for query

      public RelatorioDTO relatorio(DateTime compInicial)
    {
        // vw_relatorio: View 

        string query = "select cpfCnpj from vw_relatorio where competencia <= @compInicial";

        string myConnectionString = ConfigurationManager.ConnectionStrings["DefaultConnection"].ToString();

        SqlConnection connection = new SqlConnection(myConnectionString);

        SqlCommand dbCommand = new SqlCommand(query, connection);

        SqlParameter parameter = dbCommand.CreateParameter();
        parameter.ParameterName = "@compInicial";
        parameter.Value = compInicial;
        parameter.DbType = DbType.DateTime;
        dbCommand.Parameters.Add(parameter);

        dbCommand.Connection.Open();
        dbCommand.ExecuteReader();
        // retornar a consulta
    var retornoLista = new List<RelatorioDTO>();

        if (((SqlDataReader)(myReader)).HasRows)
        {
            while (myReader.Read())
            {
                retornoLista .Add(FiltroRelatorio(myReader));
            }
        }
        else
        {
            return null;
        }

        return retornoLista;
  }

Returning item to item:

private RelatorioDTO FiltroRelatorio(IDataReader myReader)
    {
        var result = new RelatorioDTO ();
        result.CpfCnpj = myReader["CpfCnpj"].ToString().ToUpper();

        return result;
    }