WPF application fail to load C++ dll

I hava a WPF application which uses both C# and C++ dlls. On most machines it works properly but I have a few machine which when trying to run the application on them it I get the exception: The module should contain an assembly manifest. (HRESULT:0x80131018) I have no idea about this exception. What can cause this behavior, and what can be the solution?

This HRESULT: 0x80131018 is return when a .NET application trying to load C++ assemblies as .NET dlls. The problem ws that in the code I've tried to load C++ dlls via the command: Assembly.LoadFile(path); The problem with the different OSs was depends on the different languages which return the error message in diverse sentences.