Windspeed on the graph is not showing (plotting)

Brian: I just downloaded and installed the latest beta 9.99r last night. I also have lost the wind speed plotting on the main display graph. I double clicked on the graph and tried checking the use plot thick lines but no help here. Any other suggestions.

Pent4 3.0ghz
1 gig mem
XP professional
WD
Homeseer
ws2300