Thank for the quick answer.
I actually made myself quite unclear ; I read the FAQ database (https://www.pokertracker.com/forums/vie ... 98&p=56993
) and tried to get as close as I could to my own problem through the FAQ.
I found "Most applications will have created the default user "postgres", but if yours didn't you will need to create the "postgres" user which PT3 needs.". So I thought that postgresql does not work with PT 3 because the user "postgres" has not been created (I only suppose).
Although, in my case, I did installed postgresql through another application. I directly downloaded and installed both postgresql (http://www.postgresql.org/download/
) and PT 3 in the same time this week, as I thought it was needed. Was it a mistake ?
(As for the other account, that I can access - but not see forums - I can't PM you because " We are sorry, but you are not authorised to use this feature. You may have just registered here and may need to participate more to be able to use this feature. " my nickname is "happy4u" if any helps).