Oracle Permissions Needed for ODBC Access

[DougWiz]

I am unable to create an Oracle 9i ODBC instance in the relationship graph on a customer's system (just hangs), we think because the Oracle login doesn't have read permission for the Oracle schema. The ODBC connection works fine in Oracle SQL*Plus, but my contact tells me that the login is "pretty locked down" and wants to know specifically what I need access to. Can anybody tell me, please? Or suggest a different remedy? Thanks, Doug