Adding Items to Drop Down List from Dataset

Question

Hi,

Im trying to get items from my dataset to display as text and values fro my drop down box, the dataset is coming from a Web Service to the application.
The dataset is OK but im struggling to get the information from the dataset to the Drop Down Box, here's what I have:
           ****************************************
            TimsburgWS.ServiceSoapClient nService = new TimsburgWS.ServiceSoapClient();
            DataSet nDS = new DataSet();
            nService = new TimsburgApplication.TimsburgWS.ServiceSoapClient();
            nDS = nService.listNames();


            cboCast.DataSource = nDS.Tables;
            cboCast.DisplayMember = "PeopleName";
            cboCast.ValueMember = "PeopleID";
***********************************************

Any help would be appriciated, thanks.

Matt