I really know nothing about Postgres and this seeems to be a Problem.
I was useing PT2 with an Access-DB and just installed PT3 with PostgreSQL without problems.
PT3 and PostgreSQL is working.
But i want to use my old Data (of course) and i'm completely stuck.
I went back to PT2 and selectet "Utilities->Convert Database..."
A dropdownlist has "convert to PostgreSQL" an there is a Button "Settings..."
In the Settings i have to enter a username this is "postgres" i guess,
then a password with i don't know and finally an "ODCB Entry to use" (no idea what this means)
the "ODCB Entry to use" is an empty dropdownlist with nothing to select.
the nearby Help-Link has nothing more to say and i don't know anything about postgreSQL.
[edit]
I'm runnig Windows XP