Hi Marcia! Sorry for the delay here...
Sounds as though there is something in the population settings that is causing the infinite loop. How are you populating the combo box, list view, and business objects? Depending on how you are accomplishing that and where you are making any calls to the fill methods, it could conceivably produce the behavior you are seeing.
For instance, since combo boxes have an internal business object, we typically recommend you use the CopyDataFrom method in the PopulationDataSourceSettings rather than a typical fill method to prevent multiple trips to the server. That way you populate the source BO once, then use the CopyDataFrom to pass those results on to the internal BO of the combobox.
When you use CopyDataFrom, you'll need to pass the required parameters in the ListPopulating event for the combo:
Private Sub cboYourCombo_ListPopulating(ByVal e As MicroFour.StrataFrame.UI.ListPopulatingEventArgs) Handles cboYourCombo.ListPopulating
e.Parameters(0).Value = _YourBO
e.Parameters(1).Value = MicroFour.StrataFrame.Business.BusinessCloneDataType.ClearAndFillFromDefaultView
End Sub