I just installed AutoCad 2009 & Structural Detailing 2009 and I get several errors regarding ARX files followed by a Fatal Error and Acad closes. I see there are issues with previous vanilla 2009 programs being installed prior to installing ASD (which baffles me that they couldn't make it compatible), but I don't have a "vanilla" Acad installed. However, I do have AutoCad Architecture 08 & 09, Mechanical Desktop 08, Inventor '08 and Raster Design 08 installed. I did run the updates provided for Acad 09 and Structural Detailing. No help. Any suggestions?