Windows Search isn't showing file locations?

Hi:

Somehow I lost my "Location" column in the Windows Vista Search folder
(Start > Search). I clicked into the "Choose Details" window and scrolled
down until I found the "Location" detail, which I checked.

Now, the "Location" column is showing up in the search folder, there's just
nothing in the column. If I click on the drop-down arrow on the right side
of the Location column header I see a grayed-out option of "Computing
filters...." with a spinning circle to its left, which seems to indicate
something is going on, but what?

How can I see the location of files and folders I'm searching for?

TIA

Tom Young