Please create posts about PT3 in the PT3 section of the forum - PAHud only works with PT2.
Which version did you just install? Beta 28?
What site are you playing at?
It's possible that you just have your HUD Options configured in such a way that no stats are being shown.
Have a look at the
Tutorial: Configuring HUD Options.
IF that doesn't help Please
enable logging, reproduce the problem by playing a few hands on a single table and submit your PokerTracker.log and PokerTrackerHUD.log files (zip/compress them first, call it logs.zip) to the
Support system , and link to this thread in the reference field of the ticket so that we can investigate.