Let Poker Tracker read your hand histories.

Make sure you have your e-mail sent to your actual e-mail. Not Hotmail. Then tell Poker Tracker to check your e-mail. It will check your e-mail for hand histories, import them and delete them. You can even tell PT to request hand histories for you.

I never had any luck with Poker Tracker when I tried to convert my hands to txt. But it worked fine the other way.