cognos.cgi webpage - DPR-ERR-2008 error

Have installed Cognos and WebSphere on MS Vista according to instructions on the IBM homepage, and http://www-01.ibm.com/support/docview.wss?uid=swg21343353.
(However, I had no default web page, so I had to create a Web.config file from scratch.)

When I now try to access http://localhost/cognos8/cgi-bin/cognos.cgi I get the error:
"DPR-ERR-2008 The dispatcher is unable to process the request. The request is directed to an unknown service name: ."

The cogserver.log contains the error DPR-ERR-2008 (see below). I am unsure as to what I need to do to fix this. Any help is appreciated.

<IP>:9080	5524	2010-07-23 07:56:02.124	+1					WebContainer : 4	caf	2047	1	Audit.dispatcher.caf	Request			Failure		SecureErrorId: 2010-07-23-07:56:02.123-#1  Original Error: DPR-ERR-2008 Det gick inte att bearbeta begran i dispatchern. Begran dirigeras till ett oknt tjnstenamn: .  Spra bakt fr hanterare [the_dispatcher] com.cognos.pogo.handlers.performance.PerformanceIndicationHandler [the_dispatcher] com.cognos.pogo.handlers.logic.ChainHandler [service_lookup] com.cognos.pogo.handlers.engine.ServiceLookupHandler

Also. where can I change language settings, so errors won't appear in my native language? It would help a lot with Google error searching.