Commented Unassigned: Nuget 2.5.40416.9020 fails to load NuGet.ServerExtensions, Version=2.3.31219.921 [3296]

I would like to enable the [`mirror`](http://docs.nuget.org/docs/reference/command-line-reference#Mirror_Command) command.

Given that I have copied `Nuget.ServerExtensions.dll` to the same directory as `nuget.exe`, when I run `nuget` then I get the following warning.

C:\Users\marijn>nuget
WARNING: Could not load file or assembly 'NuGet.ServerExtensions, Version=2.3.31
219.921, Culture=neutral, PublicKeyToken=null' or one of its dependencies. Opera
tion is not supported. (Exception from HRESULT: 0x80131515)
NuGet Version: 2.5.40416.9020
...

Instead, I'd expect not to get this warning and that the mirror command shows up in the list of available commands.
Comments: I have Windows 7 Ult 64 and Nuget.exe version 2.5.40416.9020 does not work with Nuget.serverextensions.dll version 2.5.40426.45. _WARNING: Could not load file or assembly 'NuGet.ServerExtensions, Version=2.5.40426.45, Culture=neutral, PublicKeyToken=null' or one of its dependencies. Operation is not supported. (Exception from HRESULT: 0x80131515) NuGet Version: 2.5.40412.9018_ .NET Runtimes Installed __Framework__ v1.0.3705 v1.1.4322 v2.0.50727 v3.0 v3.5 v4.0.30319 __Framework64__ v2.0.50727 v3.0 v3.5 v4.0.30319