Pelco Developer Network (PDN)

DSConneX SDK Export (SampleExport sample) Video + Audio

The problem is that I cannot export a video including audio stream.
DSControl Point can actually export video + audio without problems. I see in this application both streams the camera and the audio (which have the same name because it is an IP Camera with a mic). The problem is, with the sample shipped with DSConneX "SimpleExport", when I make a Search I got the available cameras but I cannot see the audio stream with the same name.
I have gone through the lines of code and I am trying to get the audio Channel instance to then pass it to the Export function together with the video stream, but I do not succeed. Once the camera video stream is found, the next line returns a null value:
IAudioChannel audioCamera = camera.AssociatedAudioChannel;

I would really appreciate some help