GPK - Corridor Modeler - "Cannot Load LANDXML file" error

I am running GEOPAK SS2's Corridor Modeler.  When I select the gpk file for CM to use I get an error message that says "Cannot load LANDXML file".  Under the Geometry item I can add the two chains and their profiles and even import them successfully (or so it tells me), but they don't appear in the ALG viewer.  I can save the rdp file, but the next time I open it I get the same error message and the alignments are not listed in the Geometry section. (I can add them again, but it really doesn't add them.)  Because of this these alignments are not available in Roadway Designer, so I can't build any corridors based on these alignments.  I've successfully done this dozens of times before on other projects, but I don't know what's happening with this gpk file.  I did a Clean and Compress on the gpk.  I made a copy of the gpk and deleted all survey information from it leaving only chains and profiles.  I even tried deleting rsc files.  Nothing I tried has solved the problem. 

Support has my files and I am awaitng an answer, but I thought I would post it here as well in case anyone has seen this behavior.

Josh Mauritz
GPK v08.11.07.566
MS v08.11.09.292