When I installing new camera the program says that the device is already in use. Whats wrong?
The program says that the audio device is used already by another camera. Simultaneous broadcastings can be performed if you have audio source for every video device. For example each camera has a build in microphone. If number of audio devices is less than number of video devices, for example you have one audio card and many video cards, you have to use broadcasting with source changing. In this case you create one Camera Window and add all your cameras to this window as source groups. You can change video sources manually during broadcasting or set up a cycler to have the program to change the sources automatically.
