I'm having a problem with a combobox showing up blank ...

It is on page 3 of a pageframe. The first time I select this page, the display is correct. If I select another page, and then return to page 3, it is empty. However, if I then click on it, it displays correctly.

RowSourceType = 5
RowSource = 'This.aRowSource'
BoundTo = .T.
BoundColumn = 2

The ControlSource is numeric.

Anybody with any suggestions?