apache not connecting to PostgreSQL anymore?

[ario <..hidden..>]

Hello, I have (created) a problem caused by moving the (KVM) VM with my
ledgersmb to another workstation. The previous IP is different from the
new one and the networking has changed from local access only to
bridged, so that the service can be accessed from everywhere when that
works.
Problem is now, that pointing the browser to 
http://<new IP> says: "It Works!", and to 
http://<new IP>/test.php (which I put myself in /var/www) gives a nice
phpinfo page, but pointing the browser to 
<new IP>://ledgersmb/login.php says it doesn't exist (anymore).

The logfile /var/log/postgresql/postgresql-8.3-main.log
says the following:

BST LOG: database system was shut down at 2011-09-21 04:52: 31 BST
BST LOG: incomplete startup packet
BST FATAL: the database system is starting up
BST LOG: autovacuum system started
BST LOG: database system is ready to accept connections

I'm at a loss now, does anybody have a clue as to how to solve this?

Thanks in advance,

ario