Hi there people.
Here's a tip.
After having a lot of problems palying acestream streams (buffering every minute or so), I found out that allowing UPnP or forwarding port helps a lot.
This of course wont' help if ISP is blocking torrents.
You can find out the the port Acestream uses by right-clicking on AS tray->settings->advanced. For me it was 8621.
Hope this helps.