jetty 6 rewrite handler not working web server

Question

I cannot make rewrite handler to work on Jetty server 6.1.24. Here is my example in Scala:

val server = new Server(8080);

val contexts = new ContextHandlerCollection();
val rewriteHandler = new RewriteHandler();
rewriteHandler.setRewriteRequestURI(false);
rewriteHandler.setRewritePathInfo(false);
rewriteHandler.setOriginalPathAttribute("requestedPath")
rewriteHandler.addRewriteRule("/site1/test1","/site2/test2");
contexts.addHandler(rewriteHandler);

server.setHandler(contexts);
server.start();

.....

Any ideas? Thanks!