DB Engine :: Linked Server Double Hop To Clipper Tables 64-32 Bit

I am attempting to reach some Clipper tables through a 32-bit ODBC driver from a 64 bit SQL Server. As there is no 64 bit driver offered for Clipper, I am pursuing a solution similar to the one described here:

Creating a Linked Server with 64 bit SQL Server 2008 to MS Access

It involves using a SQL Express 32 bit instance as a bridge.

I have created a Linked Server on the 32 bit instance MTESTXPRESS as follows:

EXEC sp_addlinkedserver @server = N'ABDATA', @srvproduct=N'DataDirect 4.1', @provider=N'MSDASQL', @datasrc=N'ABServerCA'
On the 64 bit instance ALISTESTER I have another Linked Server as follow:
EXEC sp_addlinkedserver @server = N'ABACUS', @provider=N'SQLNCLI', @datasrc=N'ALISTESTERMTESTEXPRESS'

The suggestion is to then use a select statement such as:

SELECT * FROM OPENQUERY(ABACUS, 'SELECT COUNT(*) FROM ABDATA...ABBATCH')

Unfortunately, the DataDirect driver for MTESTEXPRESS will not recognize the 'ABDATA...ABBATCH' 3-part naming convention. The error message is:

An invalid schema or catalog was specified for the provider "MSDASQL" for linked server "ABDATA"

Is there some other way to select from the MTESTEXPRESS linked server?