Browser shows JNLP file as plain text?
This is most likely happening because your web server is not aware of the proper MIME type for jnlp files. Java Web Start requires only one change to your web server, that is creating an association between the file extension, typically jnlp, and the mime type, application/x-java-jnlp-file. The steps for doing this vary depending upon the Web server you are using. Furthermore, if your corporation uses Proxy servers, ensure that the update versions of the files are returned, by updating the time stamp of the resources on the web server such that the proxies will update their caches.
