you need to upload the license to your server along with the .swf rename it accordingly (e.g if your swf is named krpano.swf license should be named krpano.license)
the problem here is your web server - a IIS server, these servers don't know the ".license" extension by default and don't deliver the file, which results in an error, but this can be solved by renaming the license file, have a look here: