I have this problem a lot of time

, is a firewall problem. Turn it off (close by exiting the program), check for subtitles and re open it. It works for me..
(Zone Alarm Free doesn´t respond to snooze in my pc)
(Windows 8 Firewall have a mode "Enables All" that yes work, then return to Normal)
(By the way: remember to re activate... I always forget to do it

)
Best regards!