Autogen SDK

Can anybody tell me, when starting Annotator, what would cause the library button on the "Control" window to be grayed out and in the file area an "MSXML ERROR to be displayed. I can't run annotator under these conditions, and I can't figure out what is causing it. I removed and reinstalled Acceleration SDK and MSXML. I Still have the same problem, leading me to believe that it is something external to those two. Thanx in advance.

Best regards to all and sundry

Step 2 in the annotator setup:

'To use the tool, make sure the file default.xml is in the same folder as Annotator.exe. The default.xml file is in the Flight Simulator X/Autogen folder.'