The wireless connection is for audio signals only. No data distribution of any kind is ment to be wirelessly transferred.
That's why the Beolab 2000 isn't compatible with the wireless solution.
That's why I think your ML connection to the Beoport wil/is not functioning properly.
Try to connect a fully wired ML connector/cable to Beoport.
i.e. try it with the ML in your avant for test.
http://www.bang-olufsen.com/Community/forums/thread-view.asp?tid=5067&mid=15710#M15710
First login to B&O community, then click the link.