NuGet command in VS : can install package but not added to packaged.config & project

I am having a problem with a package in a private repository, running install-package "PackageName" just install the package in "packages" folder, but the file packages.config doesn't contain this package, also the project file (*.csproj) is not being updated to have reference to this package.

Normally, it should have a line saying that "Added package to project successfully", but not in this case.

Could anyone please help? Thank you for any idea.

via Chebli Mohamed