Version : Latest, downloaded last night (6th March 2014) OS: Windows 7 on all the systems Firewall: The setup has an option to add exception. That was checked. And i manually checked firewall settings too, I could see exception for Bittorrent Sync. Yes secrets are identical, i copied it in a pen drive. The same secret worked for other laptops. I don't understand, it was working a few days ago. Now its not!