I am having the same problem. Have installed the 2.10.9 update (MyBookLive 02.10.09-124 : Core F/W) and it still never sleeps. Remote access disabled, no servers running, no photos. Since acquiring it 3 weeks ago it has run constantly.
I tried the connect direct to PC trick but this made no difference. I have only 170 Gb of data on it. SSH Top does not show mediacrawler running.
Anyone from WD have a solution?