[Telepathy] gst.LinkError in Telepathy Farsight

[Mystilleef]

I'm getting the following error with tp-farsight

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Traceback (most recent call last):
  File "/home/lateef/teletest/MediaChannelStreamer.py", line 54, in
__stream_created_cb
    src.get_pad("src").link(srcpad)
gst.LinkError: <enum GST_PAD_LINK_WRONG_HIERARCHY of type GstPadLinkReturn>
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The code in question:

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	def __stream_created_cb(self, channel, stream):
		print "Start of stream created!"
		stream.connect("src-pad-added", self.__src_pad_added_cb)
		srcpad = stream.get_property ("sink-pad")
		from gst import element_factory_make, STATE_PLAYING
		src = element_factory_make("audiotestsrc")
		src.get_pad("src").link(srcpad)
		src.set_property("is-live", True)
		src.set_state(STATE_PLAYING)
		self.__pipeline.add(src)
		print "End of stream created!"
		return False

	def __src_pad_added_cb(self, stream, pad, codec):
		print "Start of __src_pad_added_cb"
		from gst import STATE_PLAYING, parse_bin_from_description
		sink = parse_bin_from_description("audioconvert ! audioresample !
audioconvert ! autoaudiosink", True)
		pad.link(sink.get_pad("sink"))
		sink.set_state(STATE_PLAYING)
		self.__pipeline.add(sink)
		print "End of __src_pad_added_cb"
		return False

	def __session_created_cb(self, channel, conference, participant):
		print "Start of __session_created_cb"
		self.__pipeline.add(conference)
		from gst import STATE_PLAYING
		self.__pipeline.set_state(STATE_PLAYING)
		print "End of __session_created_cb"
		return False

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I'm not a Gstreamer expert so I appreciate any help.