The internal camera (MOTION EYE) cannot be used together with multiple applications at the same time. It can only be used with the capture application that was launched first.
To use NetMeeting, you have to check if other applications which uses the internal camera (e.g. SmartCapture, CyberCode Finder) are executed.
Start the application that you want to use after terminating all the applications that use the internal camera.
SmartCapture, CyberCode Finder, and SonicFlow supplied by Sony prompts the user with a message to quit other applications. Non-Sony applications, however, may not.