I have previously saved 2D drawings in DWF format so that I can display them on my web site using Freewheel. This worked fine until very recently, when several of my drawings now display the message: "The requested DWF is not valid." The DWFs were saved from AutoSketch version 9. I suspect something has changed in Freewheel to render these DWFs unreadable. This problem has occurred in 4 out of 5 locations on the web page.
Here are the files that are not working:
Any help would be greatly appreciated.