Are you trying to use the already packaged version or a self compiled version???
If you want to compile it yourself you should look at the developer mailinglist (Nov 2006). There you can find also the information for debugging this gstreamer stuff! You should use the latest cvs of gst-plugins-bad otherwise it won't work (look at the hole thread, it was mentioned before)!
Requested 'gstreamer-0.10 >= 0.10.9.1' but version of GStreamer is 0.10.5
You mentioned that playback is choppy. How about your cpu usage?