combobox in form but not subform

[NetworkTrade]

Access2003 the combobox was added into Form-S using the wizard option to
find/display the record selected....and this combobox/form works standalone.

....but when this Form-S is inserted as a subform, then the same combobox
selection does not trigger/display any record in the subform...

what is the relationship to the main form doing to prevent the combobox from
performing?

 

[PatHartman]

Make sure that references to the subform are correct. When you add a form
as a subform, references to it must include the parent form -
Forms!parentform!subform.Form!subformcontrol.controlproperty