Integration Monitor 411

I am trying to use Integration Monitor version 4.1.1. After entering the database, broker and Timerange values, i do not see any entries in Activations panel. When i click the refresh button, i get the following error.
Could not read work unit count.
java.sql.SQLException: ORA-00942:table or view does not exist

I have been using Integration Monitor version 2.0 without any problems. What could be the problem with Integration Monitor 4.1.1?
(We are using enterprise 4.1.1).