how to match data source id with columns's ids in resource view?

i am adding columns to day pilot calender control for resource view, i am not seeing the data in the control. do i need to match the data source id and column id explicitely ? how can i do that?

roomList.Items.ForEach(itm =>
{
col = new DayPilot.Web.Ui.Column(itm.Name, itm.Id.ToString());
DayPilotCalendar1.Columns.Add(col);
});

DayPilotCalendar1.DataColumnField = "Rooms";

Thanks