I can make successful connections to servers with this plugin to data sites such as: http://gis.apfo.usda.gov/arcgis/services, with this plugin. Unfortunately AutoCAD returns the following message when trying to bring in the NAIP imagery into my dwg, "AutoCAD error when adding raster image: eInvalid Input". Does anyone have an answer as to why this happens? Here is the site for the plugin/addition, http://resources.arcgis.com/en/help/arcgis-for-autocad/. Presently running Civil3D 2011.