Please bear in mind DLNA Media Streaming is a local service managed by your router and not affected by your Internet speeds. I would recommend performing a device reset by holding the reset switch located close to the power jack for at least 10 seconds. This will reset network settings on your WD My Book Live without affecting your data.
If this does not work then I would recommend rebuilding the Twonky database on the Dashboard management page.
I reset My WD mybook live ,i rest my Samsung Smart tv ,still having same issue it connects and after few min it diconnects but some time it work flawleass ,am still unable to resolve my issue ,majority of times it disconnects
few months back i was having issue with mkv files that time wd support suggest my switching from twonky to WD server so am using wd server
i contacted support week ago as i have warranty till 2016 but they didn get back to me regarding this issue
Can u please provide more details on how to rebuild twonky database