The licensing options for Raster Design changed a little a few years ago. Since it's a frequent topic in support, I'd like to direct you to this TS that spells out the details:
http://usa.autodesk.com/getdoc/id=TS18566069.
but the summary is:
Network Raster and Network AutoCAD: OK
Standalone Raster and Standalone AutoCAD: OK
Network Raster and Standalone AutoCAD: OK
Standalone Raster and Network AutoCAD: Not OK
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