Sorry I didn't get back to you sooner. I loaded the mobile program on my lowly Dell Streak 7. It took me a long time to get through all the options but I was finally able to play videos.
In Power DVD 12, do you see your Asus linked? (Home Media DNLA?) Did you refresh just in case?
Did you re- authorize the device? I don't know if that authorization needed that but that seems to be the next stop.
Did you enable the video folders (remote)?
Has your Home network changed?
Is the Asus lo9oking for files and finding everything but the videos? What video player are you using on the Asus? Perhaps something changed there.
Since there are many steps and options, I'm going to guess that something has changed and needs to be changed back but it may take some digging.
.
.
BoilerPlate: To posters who ask for help -- it is nice to thank the volunteers who try to answer your questions !
Anything I post unless stated with a reference is my personal opinion.