Are you sure it is not working?  I thought mine didn't work either because it does not show time passing at the bottom of the UF screen.  It does show the proper formula in the formula tab.  I got busy one time and left the computer alone for about 20 minutes and when I returned my APO was in UF.  Since then I have allowed ample time for the flame to get into UF and have not any problems.  I hope this makes sense as it is late and I do not have either program open.

 

Linda from Sunny St Petersburg
Domestic Goddess - Contessa of Da Messa