populating datagrid with a database table in Visual Studio2008

hi!
i want to populate a datagrid with a database table.i have set the properties of data grid at design time i.e. data source and data member...datagrid also shows the preview of the table of how data will be displayed, But when i run the project, datagrid is not populated,no exception and no errors are shown....its a desktop application in C# with Visual Stusio 2008.
im using Dataset  Dataset gets populated, as in the if condition ihave tried to show a label and that is shown...so im nt getting, what type of error it might be or what else to do?