PokerTracker

I installed PT3 on my mac while ago. It works fine. Now I want to install it via Parallels on Windows too. I inserted the registeration code. It accepted it. But when I click connect on Configure PostgreSQL server it says "Unable to connect to this database. Please check the configuration." Do I need to make new db somehow ?

You can if you'd like - or you can configure your Mac version to allow you to log in via Parallels - you need to make port 5432 accessible from the VM and then edit postgres.conf in OS X as explained in this tutorial.

kraada wrote: you need to make port 5432 accessible from the VM

How do you do this ?

I did a little more digging for you. The easiest way is to make sure that Parallels is set to use Host Only Networking in the Parallels Preferences. You can then see the IP range that the Parallels network is on below in the preferences window. Follow this tutorial (when it comes to editing the file - you should be able to find it via Spotlight) and then edit pg_hba.conf and postgresql.conf to allow access to the other addresses.

Host only networking is ticked but can't find the file I am supposed to edit. No such thing as configuration files found. My PostgreSQL 8.4 folder has reload configuration and pgAdmin III that come close but they lead to nowhere.

That sounds like the Applications folder. See this post for where to find the files kraada mentioned - please read the note at the bottom of the page too.

Pretty lost here Option 2 was to make totally new database ? How ? When I open PT3 in windows it goes right to the configure PostgreSQL Server box. MAC and Win versions don't need the same db. I play on Entraction with Mac and on Ipoker with Windows.

Is PostgreSQL installed in Windows?

Yes. I can find it via Windows Start menu

It's possible there's a clash between PostgreSQL on Windows and Mac if you use the same port numbers - are you using the same settings? What values do you have in the connection dialog on Windows?
You could try reinstalling PostgreSQL on Windows and use a different port - see the guide in the Documentation if you want to try that, although Kraada may have further advice as he has more experience of this sort of thing.