protocol servlet doesn't work

Piratenvisier <[email protected]>
Newsgroups gmane.text.xml.cocoon.user
Message-ID <[email protected]> 
in the distribution 3.0.0-beta-1-SNAPSHOT of cocoon3 I have a problem 
with the
rest example rhe response of servlet:controller/screen brings the error

java.net.MalformedURLException: unknown protocol: servlet
      at java.net.URL.<init>(URL.java:592)
      at java.net.URL.<init>(URL.java:482)
      at java.net.URL.<init>(URL.java:431)
      at org.apache.cocoon.rest.controller.response.URLResponse.<init>(URLResponse.java:49)
      at org.apache.cocoon.sample.controller.DemoRESTController.doGet(DemoRESTController.java:54)
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