Edrawings and SNL

Hi,

I have SW 2008 SP4.0 and I try to install edrawings 2008 SP4.0 onthe same computer and I get this error :

Unable to check out a SolidNetwork License(SNL) as configured foryour system.
Operationg as the free eDrawings Viewer.

I don't have any SNL.

Could you help me ?

I need eDrawings Pro to take measure.

SolidworksEdrawings