I'm pretty sure PT3 will work with freerolls, but not play money. There is a difference, albeit a minor one. Also, if you are playing at PokerStars.net, or FullTilt.net there may (or may not) be a difference. PT3 is still beta, and they are preferring established players do the beta testing.
It probably will never work for play money. Even with a healthy br at 3 major sites, I sort of wish it could work with play money, but I understand why they really don't want to put much if any effort into play money data tracking.