Go to the Twonky UI, and select the ‘Sharing’ page, then look at the list of Media Receivers and find your Samsung TV. Make sure that the receiver type is set to one that accepts video; Generic Media Receiver’ or ‘Songbird DS’ seem to work for my media player apps.
http://community.wd.com/t5/WD-My-Cloud/FAQ-Twonky-DLNA-Media-Server-Setup-amp-Use/td-p/858810
Loss of your dashboard could be one of many reasons. When you say ‘unplugged’ do you mean ‘removed power’? What did you unplug from what?
One possibility is that the IP has changed: go to your router UI and find what IP address it has for your MC (then set it static), and use that address to access the dashboard.
If that doesn’t work, you’re into reset territory: read the manual.
