9i and 10g ODBC client

Hello. I have a client that has an issue with ODBC connections. They had the 9i Oracle client installed already on the desktop. 10g client was then installed. Once 10g client was installed they can no longer connect to the 9i instance but they are able to connect to the 10g instance. Any suggestions?
Thanks

Does that mean that they will have to change the $ORACLE_HOME env variable each time they attempt to access either the 9i or 10g database?No.
Unless you have a very specific requirement to use only the 9i ODBC, the 10G ODBC should work for both.

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