Unfortunately there is a problem with IIS servers,
they don't know a MIME type for the ".license" extension by default,
and then the server doesn't deliver the file.
you can test this by trying to open the link to license file:
http://--your-server--/path/krpano.license
1. add a MIME type for ".license"
the correct type would be "application/octet-stream"
have a look here:
http://support.microsoft.com/?scid=kb%3Ben-us%3B326965&x=15&y=13
2. change license filename and extension
change the name of the "krpano.license" file to a other filename with an extension that the IIS servers knows.
for example, rename:krpano.license -> license.xmlor any other name:
krpano.license -> anyname.gif
krpano.swf?pano=krpano.xml&license=license.xml
so.addVariable("license","license.xml");