If the Smart Firewall block a application you can allow this apllication to access the net via Settings --> Network --> Smart Firewall --> Program control.
But these settings does not affect automatically. The application is too blocked. You must open the NIS application and close each time to activate the settings for this application (NIS 2012 & NIS 2013).
This behaviour is very annoying, please fix as soon as possible.
Regards
Ralf