Hello just incase someone needs the info..
that dll that contains the OSGeo.MapGuide;
Autodesk.Map.Platform.Core.dll and AcMapApiMgd.dll are part of Map 3D, not MapServer(AIMS or MapGuide).
You probably forget to convert your virtual directory to web application in IIS.
Access a broad range of knowledge to help get the most out of your products and services.
Start with some of our most frequented solutions or visit the Installation and Licensing Forum to get help installing your software.
Upgrading to a 2015 product? Make sure to check these out 1st!