KNemo Traffic Graph -- Gone!

Hi, When I first installed KNemo, one of the things it would display is a graph of total network traffic through my Ethernet interface. Somewhere along the line, this display seems to have disappeared. I cannot seem to find any configuration that enables it nor figure out how to activate that window, but presumably I just don't know what to look for. The "Traffic Plotter" tab of the configuration dialog is there and accessible and all the check-boxes it contains are selected. Can some one help me bring the Traffic Plotter display back? Thanks. Randall Schulz