Problem connection to local network DB

I have installed PT3 with PostgreSQL on 2 machines, with the goal of using only one DB from both machines ( its random if i use my laptop or office comp. to play.
And i dont seem to get this to work, they are both connected to the same LAN. When i try to connect to the database from my laptop i get the error message
" Unable to log in to datebase(template 1). Reason : could not connect to server : Connection refused (0x0000274D/ Is the server running on host "10.0.0.20" and accepting TCP/IP connections on port 5432?"
Yes the server is running on 10.0.0.20 and i have no internal firewall that should prevent any ports.
I hope any of you can assist me with this problem, might be an easy answer also since im a complete n00b with PostgreSQL
Thanks for any answers in advance
Ole
And i dont seem to get this to work, they are both connected to the same LAN. When i try to connect to the database from my laptop i get the error message
" Unable to log in to datebase(template 1). Reason : could not connect to server : Connection refused (0x0000274D/ Is the server running on host "10.0.0.20" and accepting TCP/IP connections on port 5432?"
Yes the server is running on 10.0.0.20 and i have no internal firewall that should prevent any ports.
I hope any of you can assist me with this problem, might be an easy answer also since im a complete n00b with PostgreSQL

Thanks for any answers in advance
Ole