I have a boeport box on Vista running the 4.81 software, I rebooted my PC last night and now my Beoport does not show all the sources, its ML'd to a BeoSound 4 in the same room 

Beosound 4 Option 1 Speakers  LAB6000 ML'd to the Beopport

Beoport Option 4 IR eye and LAB4000 speakers

Sources missing from the beoport ( i have go into config and checked )

Radio, CD, AMEM,TV, SAT, DVD, DVD2,VMEM

Sounds like an ML issue probably related to switching the PC off. Switch the Beoport off (unplug it) and then switch back on again. That usually fixes it. If not, switch the BS4 off at the same time and when you switch back on, switch the BS4 on last.

My Beoport can be temperamental but not that often as I rarely switch my Mac off.