NullPointerException

[xin zhang]

Hi,

When I tried the example 
http://localhost:8080/gadgets/ifr?url=http://www.labpixies.com/campaigns/todo/todo.xml,

I can only see the task list and get the error message:
:WARN:  /gadgets/proxy
java.lang.NullPointerException
        at 
org.apache.shindig.gadgets.servlet.ProxyHandler.fetch(ProxyHandler.java:334)
        at 
org.apache.shindig.gadgets.servlet.ProxyServlet.doGet(ProxyServlet.java:54)
        at 
javax.servlet.http.HttpServlet.service(HttpServlet.java:707)
        at
 javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
        at 
org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:487)
        at 
org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:362)
        at 
org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
        at 
org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:181)
        at 
org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:726)
        at 
org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:405)
        at
 
org.mortbay.jetty.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:206)
        at 
org.mortbay.jetty.handler.HandlerCollection.handle(HandlerCollection.java:114)
        at 
org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
        at 
org.mortbay.jetty.Server.handle(Server.java:324)


What am i missing?
Thanks