Can't sync movies to iPad; can't share movies on network

On the iPad (with retina display), when trying to watch movies shared from iTunes, after selecting the shared library, the circle spins for a while until failing with "Unable to turn on Home Sharing". This started happening a lot recently, but I figured it wasn't that bad....I can just sync a few movies to the iPad, no problem, right? WRONG!!!! I cannot sync movies to the iPad either. iTunes just acts like it is doing something, then after a while it just stops acting like it's doing anything. The movies never sync. Also, if I deselct movies that are already there, they still do NOT get removed from the iPad.

You might ask how I got the movies there in the first place. This happened once already and I reset the iPad. I was able to watch one movie in my shared library before getting the "Unable to turn on Home Sharing", and I was able to sync 4 movies. That was it though, and all attempts to watch shared movies or to sync movies now fail. Funny thing is that when I reset the iPad I lost a lot of custom settings. I only got movies on it for a day biut I've been configuring my erased settings for a week. I have reset my account info for home sharing in the iPad multiple times. I have reset the iPad. As I said, resetting worked for a day or two.

Any ideas?

Gary