The behavior you described is expected. If your application runs in 64-bit mode, all of the components it uses must also be 64-bit. There is no 64-bit Jet OLE DB Provider, so you get the message described. You would receive a similar error when trying to connect to a database using OLE DB or ODBC if there is no 64-bit version of the specified OLE DB provider or ODBC driver.
This problem only occurs in applications that run in 64-bit mode. Compiling the application so it runs only in 32-bit mode is the best current solution.
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Win XP X64 Jet V4.0