Oracle Database Discussions

Hi guys,

I've been struggling a few days with getting the Enterprise Manager up and running.
I can apparently log on, but is told the there is an internal error.
It has something to do with the Listener that's not connected.. it says.

I've already tried a whole bunch of things suggested on google:
- followed the oracle install guide
- re-installed it 5 times with various settings
- added a loopback device (not sure it's needed?)
- allowed ports 1158 and 1521 through the firewall
- added ORACLE_UNQNAME, ORACLE_HOME, DATABASE_HOSTNAME to environment variables.
- ran emca -deconfig and config
- plus a great deal of other things...

the listener seems to be running and is listening on 1158, I can also get a promt on localhost:1158/em.
I've tried to hack the config files and set them up with - what I believe to be the correct - IP and domains.

After 3 straight days of googling I'm running out of steam and ideas to try.
It all appeas to install correctly, except for one little warning af the end of the install process:
"Error starting Database Control. Please execute following commands:
1) set the environment variable ORACLE_UNQNAME to database unique name.
2) emctl.bat start dbconsole"

I believe I've done both, but I'm not entirely sure what the "unique database name" is, I guess it's "orcl"?
when I go to sqlplus and do "select * from v$database" it responds with just a number: "2".

It all seems to be launchable from the startmenu and appears correctly installed at first sight.
My feeling is some tiny setting is probably wrong, but which one and in what config file?