What you need to do depends on the version of the Netflix app installed on your device.
Netflix version 3 and later
Applies to: Year 2013 and newer TVs, 2014 and newer Blu-ray Disc® players and home theater systems
Netflix version 1 & 2
Applies to: Year 2009-2012 TVs, 2009-2013 Blu-ray Disc® players, 2010-2011 home theater systems, 2010-2011 Network Media players