There is no real preconfiguration required, but as a result of previous dbms upgrades, the dbms_debug packages can cause problems. If this database instance has previously bee upgraded, you can logon to the server computer, go to $ORACLE_HOME/rdbms/admin, start SQL*Plus under the SYS account, and run pbload.sql. This will reload the dbms_debug packages. Check if this has a positive influence on the problem.