Hi Andrew,
In order to play either an entire album, or skip to the next or previous track in an album, either using the front controls on the BS5 or your the up and down controls on your Beo4 remote, you have to select the album of your choice whilst either in 'Album' mode or 'Covers' mode on the BS5.
If you select a track whilst in 'Title" mode the BS5 will just play that track and then MOTS takes over.
I have found that you can play an entire album from just selecting a track by following this procedure:
Select any track whilst in 'Titles' mode
Press the left hand button on the BS5, the album cover will appear on the screen of the BS5
Move the cursor to 'Covers' mode, and then press GO.
The BS5 will then start to play the entire album and you can skip tracks as desired.
Kind regards
Paul