My Book Live Duo 4TB is not listed in WD TV Live Hub - Media Server source

I have My Book Live Duo 4TB with media server turned on.

In WD TV Live Hub, I change the source to Media Server, but cannot see My Book Live Duo. When I change the source to Linux Share I can see My Book Live Duo, but this is not what I want.

Why is My Book Live Duo not listed in Media Server source in WD TV Live Hub?

Hello,

Have you tried resetting both devices?