SQL Server linked server to Oracle

We have a SQL Server instance with a linked server to Oracle 9i.  When doing a select * (from Oracle) into some_table everything works as expected.

There is a project to move the SQL Instance to a new clustered server.  We confirmed that the OS, SQL and Oracle Driver versions are the same.  The problem is that when we run the exact same statement the table is being created with unicode columns.

For Example:

Oracle

Col1 Varchar2(20),

Col2 Varchar2(100)

Select into on current SQL Instance creates

Col1 Varchar(20),

Col2 Varchar(100)

Select into on new SQL Instance creates

Col1 NVarchar(20),

Col2 NVarchar(100)

Any help to identify how to resolve this issue?

Thank You,

Michael