Unable to Measure

I have SW eDrawings 2009 SP2. I try to open SW assemblies, SWparts and eDrw models with measurment optionenabled. I can see icon on the low status bar telling me Ican measure and still measurment tool isdisabled (grayed out). I read that others have had thisproblem since eDrw 2007 but nobody has a solution. Or maybe youhave?

ciao

MarcoSolidworksEdrawings