Error when building iConf.NET Demos. Namespace name 'iConfServer' cannot be found

Question

I am trying to build iConf.NET demo for video conferencing SDK.

The projects have references to assemblies named:

• iConfClient.NET.dll
• iConfServer.NET.dll

The references are ok.

In code there are following lines:

using iConfServer.NET.HelperClasses;

..etc, which are causing the errors of type

The type or namespace name 'iConfServer' could not be found (are you missing a using directive or an assembly reference?)
C:\Users\Администратор\Desktop\iConfNetSDKDemos\PictureInPictureVideoPhone\MainForm.cs

Any help will be appreciated