Problem with JRuby-On-Rails-Deployment

Hi!

There is a slight problem with the deployment of my
jruby-on-rails-application: it simply does not work.

I installed the plug-in goldspike and created a .war-file out of my
application. Afterwards I used the apache tomcat manager to upload the
war into the webapps-folder.

As I try to access the webapplication I get an 404-error-message:

HTTP Status 404 - /SWAN/

type Status report

message /SWAN/

description The requested resource (/SWAN/) is not available.

Apache Tomcat/6.0.18

Maybe someone can help me.
Thanks in advance.