Client 10g fail to connect to server 8i

Hi everybody. We're having some trouble when a machine with oracle 10g client tries to connect to a server running oracle 8i (8.1.7.0). In fact, we can't connect. The error message that arises with sqlplus is ORA-12564 (connection refused). Changing the client to version 8i, it works fine. Looking at the docs from Oracle, 10g client should be able to connect to 8i, but we can't.
Any ideas?? I have only access to the machine with the client, the server is administrated by other people.

There is a bug/ issue where the 10g client cannot connect to any version of the database prior to 8.1.7.4, the terminal 8.1.7 patchset. It is expected that this will be resolved in the first 10g patchset, allowing connections to 8.1.7.0 and higher databases. In the meantime, you can either use an earlier version of the client or ask that the server be upgraded to the latest patchset (which probably isn't a bad idea for other reasons).
Justin
Distributed Database Consulting, Inc.
http://www.ddbcinc.com/askDDBC

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