error after a new ES2 installed

I'm getting this error when the app server starts up. the installation itself finished without any problem or errors. The OS is SUN Solaris and DB is Oracle 10g. Any idea?

[4/28/10 18:13:51:352 EDT] 00000019 DBModelPersis E com.adobe.datamodel.repository.DBModelPersistence getModels Naming exception during loading of all data models: javax.naming.NameNotFoundException: Name "IDP_DS" not found in context "java:".