Cannot use db_create in MSF3

[hakermania]

I always have the message

[-] 
[-] Warning: The db_create command is deprecated, use db_connect instead.
[-]          The database and schema will be created automatically by
[-]          db_connect. If db_connect fails to create the database, create
[-]          it manually with your DBMS's administration tools.
[-] 
[-] This database command requires the following tools to be installed: psql, dropdb, createdb

And when I use db_connect:

[-] Error while running command db_connect: Failed to connect to the database: could not connect to server: Connection refused
	Is the server running on host "127.0.0.1" and accepting
	TCP/IP connections on port 5432?


Call stack:
/opt/metasploit3/msf3/lib/msf/ui/console/command_dispatcher/db.rb:1621:in `db_connect_postgresql'
/opt/metasploit3/msf3/lib/msf/ui/console/command_dispatcher/db.rb:1289:in `cmd_db_connect'
/opt/metasploit3/msf3/lib/rex/ui/text/dispatcher_shell.rb:246:in `run_command'
/opt/metasploit3/msf3/lib/rex/ui/text/dispatcher_shell.rb:208:in `block in run_single'
/opt/metasploit3/msf3/lib/rex/ui/text/dispatcher_shell.rb:202:in `each'
/opt/metasploit3/msf3/lib/rex/ui/text/dispatcher_shell.rb:202:in `run_single'
/opt/metasploit3/msf3/lib/rex/ui/text/shell.rb:141:in `run'
/opt/metasploit3/msf3/msfconsole:117:in `<main>'

I really need to make this because I cannot use db_autopwn

[sickness]

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