unless there's more to this, I think your saying you have a session running with those parameters and now you can't start another session.
If so, it sounds like the first session is running in 'single-user' mode. If so, you can't connect a second session.
To fix this the first session has to run in mulit-user mode, as does the second. This feature is controlled by a -1 flag near the -db flag. These flags should be in your database.pf file . Just stop the session, remove the -1 flag from the *.pf file, start a server process from the DB, and re-start the first session. (I assume you know what a server process is).
