recover data

i am using postgres sql 8.0 in microsoft windows 2003
server. The database in not going connect this message
in apppear "2007-07-19 18:50:07 ERROR  : could not
connect to server: Connection refused
(0x0000274D/10061)Is the server running on host
"127.0.0.1" and accepting TCP/IP connections on port
5432?"
How can i connect the databse?
How can i recover my data? I have not backup of few
days.

please guide me 
Thanks
Mahmood




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