Workflow HTTP Server missing files

I have webMethods 6.0 sp2 installed on a Windows 2000 Advanced server box. It has Workflow Server version 030613.1995. We are using a workflow which is intended to use the web Inbox. I have created the project and deployed it to the server, and put it in a Process Model for initial testing.

Every time the Workflow receives a document 2 errors are generated in the Workflow Administrator HTTP Server. It never gets to the Inbox, and the Workflow is never in the Active workflows inside the Workflow Monitor tool.

The 2 errors are about missing files.
NLS\resources_en.jar and NLS\resources_en_US.jar

I have a ticket open at webMethods about these missing files.