I am trying to use the road graph plugin within qgis 1.8 (running under windows 7 64 bit). when I click vector-> road graph -> settings I get the settings-panel:

But, I dont know how to enable the "working-panel", which should appear on the left side of the main window, accoording to the producers of the plugin (http://gis-lab.info/qa/road-graph-eng.html, screenshot of pic #2 is taken from their site):

any hints, what I am doing wrong/ whats missing?
thanks Kurt