EZCONNECT problem with Oracle11 (solved)

This is solved. As it turns out, it isn't a bug but a feature. On Oracle10g and previous releases, the client was specifying the service name. On oracle11 and later, one should specify default service for the listener by using DEFAULT_SERVICE_<listener_name> directive in the listener.ora. That means that the default service can now be configured and that, if the target database is 11g or later, one doesn't need to modify the service_names parameter to make certain database the default one.

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Mladen Gogala
http://mgogala.freehostia.com