What are the valid client versions for DOA into Oracle Server 9.2i and also into Oracle Server 10g?

The problem I am having is this: I have 2 identical databases, both with a test table called T with 4 fields. I can DOA into the table when I have both 10g Client and 10g Server running on the same machine. But I cannot use 10g client with a remove 9.2i machine. The error I get is "ORA-00942 Table or View does not exist", which I have to add is somewhat misleading, since in both cases I clearly have a T table and in both cases I am able to connect to is using queries.

Thanks for any help,

Dean