NotesException: Could not load dll for system name Windows Vista

I am getting the following error when running a java console application that is trying to start a notes session. My workstation is running Windows Vista 64 bit and Notes 8.0.1 with JRE 1.6.0_06.

NotesException: Could not load dll for system name Windows Vista

    at lotus.domino.NotesThread.load(NotesThread.java:297)

    at lotus.domino.NotesThread.checkLoaded(NotesThread.java:327)

    at lotus.domino.NotesThread.sinitThread(NotesThread.java:181)

The error occurs simply calling:

NotesThread.sinitThread();

This same program used to work on a Windows XP 32 bit workstation running Notes 8.0.1.

I searched both the general web and this forum but did not find any related information…

Does anyone else encountered this or know how to correct it?

Thank you!