With Windows Server 2008 or higher ContaCam needs Desktop Experience installed on your server machine. It's better to install it before installing the camera drivers:

A. Install Desktop Experience

1. Click Start, click Administrative Tools, and then double-click Server Manager
2. In Server Manager, click Add Features under Features Summary
3. In the Add Features Wizard dialog box, make sure that the Desktop Experience option is selected
4. Click Next, and then click Install
5. After the installation process is complete, click Close, and then close Server Manager

Note: After you install Desktop Experience, you have to restart the computer

B. If ContaCam is not working re-install the camera drivers

C. If ContaCam is still not working get DirectX from here and install it