posgresql-8.2 startup problem

Hi guys,

I just installed postgres-8.2 using the command line
apt-get install postgres-8.2 and it seems the installation went ok,
but when it tries to start postgres , it fails with this error message
below...
(by the way I am running ubuntu fiesty and on an amazon ec2-image).
Any ideas what is wrong?

Regards,
Beat

Setting up postgresql-8.2 (8.2.5-0ubuntu0.7.04.1) ...
 * Starting PostgreSQL 8.2 database
server
* The PostgreSQL server failed to start. Please check the log output:
2007-11-01 14:16:26 CET LOG:  could not load root certificate file
"root.crt": no SSL error reported
2007-11-01 14:16:26 CET DETAIL:  Will not verify client certificates.
2007-11-01 14:16:26 CET LOG:  could not translate host name
"localhost", service "5432" to address: Name or service not known
2007-11-01 14:16:26 CET WARNING:  could not create listen socket for
"localhost"
2007-11-01 14:16:26 CET FATAL:  could not create any TCP/IP sockets

[fail]
invoke-rc.d: initscript postgresql-8.2, action "start" failed.
dpkg: error processing postgresql-8.2 (--configure):
 subprocess post-installation script returned error exit status 1
Errors were encountered while processing:
 postgresql-8.2
E: Sub-process /usr/bin/dpkg returned an error code (1)