Unable to Connect to PostgreSQL Database

I downloaded PT3 a few weeks ago and I have the latest version. Everything has been working fine until this morning when I was unable to connect to PostgreSQL database. I had been running version 8.2 of postgreSQL, which I think was leftover from when I was using it with PT2. I went through all the steps to uninstall then reinstall postreSQL 8.3.5 per the instruction on this site. That went smoothly, but when I checked in task manager, postgreSQL did not appear to be running. So I went to Start----Programs------PostgreSQL-------Start Service. A small window popped up and said it was starting service. After several minutes this window closed, but still no indication in task manager that sQL was running.
Now when I open PT3 a small window is popping up with the heading "Configure PostgreSQL Database. All the fields are filled in except for password. I tried various passwords (postgres, dbpass, etc.,) and then clicked create, but then i get a "Unable to create PostgreSQL database:" message.
I'm at a bit of a loss as to what to do now.
Now when I open PT3 a small window is popping up with the heading "Configure PostgreSQL Database. All the fields are filled in except for password. I tried various passwords (postgres, dbpass, etc.,) and then clicked create, but then i get a "Unable to create PostgreSQL database:" message.
I'm at a bit of a loss as to what to do now.
