Rowsource for ado/datacombo

I am trying to create a datacombo with an ado connection (using an Access table as the source). When Rowsource is selected in datacombo properties, there is a message that an intrinsic control or RDO is required. Data Source is set to the ado control. I've tried it with an intrinsic data control and it works. There is probably something very basic I am doing wrong (I am new to VB). Can anyone help?
Thanks.

I think you use DBcombo or ComboBox. try to use DataCombo ( go to project -> component and tick Microsoft Datalist Control(OLEDB)

Thanks. That was the problem.
lew