how to run lava-test in qemu by lava-server control

hello, all
I add qemu device according documentation (http://lava.readthedocs.org/en/latest/qemu-deploy.html)
I Run command
$ lava-dispatch /tmp/qemu.json
some errors show and how to resolve it ? how to run lava-test in qemu by lava-server control qemu device ?

<LAVA_DISPATCHER>2012-09-19 06:04:24 PM INFO: [ACTION-B] deploy_linaro_image is started with {u'image': u'http://releases.linaro.org/images/12.03/oneiric/nano/beagle-nano.img.gz'}
<LAVA_DISPATCHER>2012-09-19 06:04:24 PM INFO: Downloading image: http://releases.linaro.org/images/12.03/oneiric/nano/beagle-nano.img.gz
<LAVA_DISPATCHER>2012-09-19 06:04:24 PM WARNING: [ACTION-E] deploy_linaro_image is finished with error (<urlopen error [Errno 111] Connection refused>).
Lava failed at action deploy_linaro_image with error:<urlopen error [Errno 111] Connection refused>
Traceback (most recent call last):
  File "/srv/lava/.cache/eggs/lava_dispatcher-0.17.2-py2.7.egg/lava_dispatcher/job.py", line 170, in run
    action.run(**params)
  File "/srv/lava/.cache/eggs/lava_dispatcher-0.17.2-py2.7.egg/lava_dispatcher/actions/deploy.py", line 88, in run
    kernel_matrix=kernel_matrix, rootfstype=rootfstype)
  File "/srv/lava/.cache/eggs/lava_dispatcher-0.17.2-py2.7.egg/lava_dispatcher/client/qemu.py", line 56, in deploy_linaro
    image_file = download_image(image, self.context)
  File "/srv/lava/.cache/eggs/lava_dispatcher-0.17.2-py2.7.egg/lava_dispatcher/downloader.py", line 153, in download_image
    with reader(url, context.lava_proxy, context.lava_cookies) as r:
  File "/usr/lib/python2.7/contextlib.py", line 17, in __enter__
    return self.gen.next()
  File "/srv/lava/.cache/eggs/lava_dispatcher-0.17.2-py2.7.egg/lava_dispatcher/downloader.py", line 62, in _http_stream
    resp = opener.open(url, timeout=30)
  File "/usr/lib/python2.7/urllib2.py", line 400, in open
    response = self._open(req, data)
  File "/usr/lib/python2.7/urllib2.py", line 418, in _open
    '_open', req)
  File "/usr/lib/python2.7/urllib2.py", line 378, in _call_chain
    result = func(*args)
  File "/usr/lib/python2.7/urllib2.py", line 1207, in http_open
    return self.do_open(httplib.HTTPConnection, req)
  File "/usr/lib/python2.7/urllib2.py", line 1177, in do_open
    raise URLError(err)
URLError: <urlopen error [Errno 111] Connection refused>
Traceback (most recent call last):
  File "/srv/lava/instances/test/code/r57/bin/lava", line 54, in <module>
    lava.tool.main.LavaDispatcher.run()
  File "/srv/lava/.cache/eggs/lava_tool-0.5-py2.7.egg/lava/tool/dispatcher.py", line 147, in run
    raise SystemExit(cls().dispatch(args))
  File "/srv/lava/.cache/eggs/lava_tool-0.5-py2.7.egg/lava/tool/dispatcher.py", line 137, in dispatch
    return command.invoke()
  File "/srv/lava/.cache/eggs/lava_dispatcher-0.17.2-py2.7.egg/lava/dispatcher/commands.py", line 101, in invoke
    job.run()
  File "/srv/lava/.cache/eggs/lava_dispatcher-0.17.2-py2.7.egg/lava_dispatcher/job.py", line 170, in run
    action.run(**params)
  File "/srv/lava/.cache/eggs/lava_dispatcher-0.17.2-py2.7.egg/lava_dispatcher/actions/deploy.py", line 88, in run
    kernel_matrix=kernel_matrix, rootfstype=rootfstype)
  File "/srv/lava/.cache/eggs/lava_dispatcher-0.17.2-py2.7.egg/lava_dispatcher/client/qemu.py", line 56, in deploy_linaro
    image_file = download_image(image, self.context)
  File "/srv/lava/.cache/eggs/lava_dispatcher-0.17.2-py2.7.egg/lava_dispatcher/downloader.py", line 153, in download_image
    with reader(url, context.lava_proxy, context.lava_cookies) as r:
  File "/usr/lib/python2.7/contextlib.py", line 17, in __enter__
    return self.gen.next()
  File "/srv/lava/.cache/eggs/lava_dispatcher-0.17.2-py2.7.egg/lava_dispatcher/downloader.py", line 62, in _http_stream
    resp = opener.open(url, timeout=30)
  File "/usr/lib/python2.7/urllib2.py", line 400, in open
    response = self._open(req, data)
  File "/usr/lib/python2.7/urllib2.py", line 418, in _open
    '_open', req)
  File "/usr/lib/python2.7/urllib2.py", line 378, in _call_chain
    result = func(*args)
  File "/usr/lib/python2.7/urllib2.py", line 1207, in http_open
    return self.do_open(httplib.HTTPConnection, req)
  File "/usr/lib/python2.7/urllib2.py", line 1177, in do_open
    raise URLError(err)
urllib2.URLError: <urlopen error [Errno 111] Connection refused>

thank you
chrguo