Being one of the first to receive an Avov 2 box, I reported very quickly the same issue with 1Channel you're experiencing. The Avov support team jumped on it immediately and replied it was caused by bad links in the server lists. They told me to try other links further down the list and voila, they were correct. I have some favorites I use like vidto and vidzi, among others. I've not seen the issue since I've developed my list of favorite servers to use. As I've posted before, I have a 1.5Mbps DSL connection and while I have to put up with occasional buffering, it is enough to enjoy the benefits of IPTV and the Avov boxes (I have both 1 and 2).
And btw, just because your favorite server is in a list, doesn't mean there's a valid link to the movie you want to watch. Trial and error sometimes.