I first had this problem when starting up my PT3 (which I haven't used in probably a year or so):
Error connecting to default database.
Please select one of the valid databases below or create a new one.
Note: It may take time for the Database List to fully populate.
After a quick bit of browsing on the internet I saw it was recommended to install the latest version of PT3 which I have done and then to uninstall and reinstall postgreSQL 8.3 (the one I had).
So I uninstalled and reinstalled version 8.3.20 as it was the latest version with the win32 file (one of the steps from PT instructions), following the online instructions from this website which was fine until I got to Service Configuration. The instructions say to create a password (SQL says create a password or leave it blank, I've tried both) which I have done but its not letting me past this stage and flagging up a message saying invalid username and/or password etc...
Help please?
PS I'm using Windows Vista (have followed all the appropriate steps for Vista) if this is of relevance.
Thanks in advance!