AutoCAD .NET :: Mismatch Processor AMD64 Vs MSIL

I've been getting this in my warning box on VS 2010:

"There was a mismatch between the processor architecture of the project being built "MSIL" and the processor architecture of the reference "accoremgd", "AMD64". This mismatch may cause runtime failures. Please consider changing the targeted processor architecture of your project through the Configuration Manager so as to align the processor architectures between your project and references, or take a dependency on references with a processor

architecture that matches the targeted processor architecture of your project." and one for acdbmgd, and acmgd

I have not changed the references or properties for my project for almost a year now.  I think it has to do with the recent updates from Microsoft (updates to add .net 4.5), or perhaps the beta updates for Autodesk 2014 products.  My project runs exclusively on AutoCAD (Mechanical) 2013, Windows 7 64bit.  My accoremgd is v4.0.30319.

My cpu (and all of our office) is Intel i7 or Xeon, so the AMD64 had to come from Autodesk.I have .Net Presentation Core referenced, my Project Type is .Net 4.0.  My language is VB.Net..These warning have no effect on compiling and running the code