WD TV Live SMP, PlayTo Not Working

[cncb 25]

Has anyone been able to get PlayTo to work for the WD TV Live SMP player?  When I try to PlayTo from the web interface, the WD screen goes black and it shows a timeline with 0:00 and a "stopped" icon.  When I go to the "Remote Control" interface of the MB web interface all controls are greyed out.  After a few seconds the WD screen displays the text "This is sharing content from Windows" over a dimmed home screen background and then after about a minute it "exits" and goes back to the home screen.  Note that I am able to browse the MB server as a DLNA client and play the same video fine on the WD so the profile seems correct.