PokerTracker

I installed Poker Tracker 3. Imported hands.
But when I play hands in replayer there are no PAHud stats.
Why and what I need to do?

PAHud does not and will not work with PT3. PT3 has a built in HUD.

To see HUD stats in the Replayer you will need to be using Beta 28 not Build 4 as this was added after Build 4 was released.
Then enable the 'Use HUD' option on the Replayer window.

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PT3 Build History / Release Notes

Please read the release notes as there have been some significant changes in recent versions.