In Access 365 the parameter used in a query that is opened by a form with a combo box looks like this;
[Forms]![frmNAME]![cboNAME]
When completing the criteria in the query, you are prompted on what to populate......all in all very easy
If I use the same approach in Access 2007 there is no prompting and the parameter looks like it does nothing except prevent the form form working at all.
ie: if the combo box offers a selection criteria such as Customer_Name and the Command Button has a Run Report event on click then the report opens unpopulated. If I remove the combo box and the paramater criteria in the query then the report opens perfectly, only not filtered by Cusomer_Name.