I have a top-level form which, at times, calls other forms like a popup calendar to select a date. When the other form comes up, the top-level form disappears. When the popup form is closed the top-level form does not reappear.

FormName.Visible = .T. - has no effect
FormName.Activate - has no effect
FormName.Release - does release the form

How can I get my form to reappear?