Print-to-fax no longer works

I recently had some problems with my XP Media Center install (SP2). After
lots of uninstalls and reinstalls, problems are fixed, except now when I go
to print-to-fax (use the fax driver as a printer) it no longer works. Instead
a Fax Wizard appears and disappears in an instant and nothing happens. I've
tried removing and reinstalling Fax in the "Add Windows Components" but it
didn't work. I can fax from the fax program, at least a test page, but I want
the print-to-fax option back.

Thanks for any help.
EdB