Replication Manager 5.4.0.0 Setup

Hi all

I am new to Replication Manager and am trying to setup a new application set for Solaris 10 and Oracle 10.

I have installed the agent etc.

The DBA's have created me an user with DBA role on Oracle

On Replication Manager Console the host is added and all is OK

When creating a New Application Set the required host appears.

I enter a name, expand the host and the Oracle option is available

Expanding shows me the DB instance I want.

I then select the database and the Setup Application Login (Oracle:INV) appears

I complete Username and Password and click OK. The Connect String and OS Username fields are pre populated.

It takes around 10 second and the following error appears

10 Apr 2012 10:03:26 AM dlhasvr01 026490 ERROR: Oracle query or command returns error: status:-1 Error code: 12154 Error message: Error while trying to retrieve text for error ORA-12154.

10 Apr 2012 10:03:26 AM dlhasvr01 001577 ERROR: Replication Manager could not connect to Oracle because of error 12,154.

Any ideas