REST on Apache Tomcat

Hello, I have the problem with the deployment of my Rails application on Tomcat. The first problem is that I was not able to use the acts_as_ferret plugin when creating the war file. I always got an "IO error -- ferret". Then I eliminated the plugin and I was able to create the war file. My problem now is that I created a REST application with rails and if I want to access the resources I always get a "Requested resource not available" error. Has someone experienced the same problem? How can I resolve it?

Thanks Manfred