When you load the Studio Woodwinds Professional patch called "B - Flute Solo - Legato" it will not play sound as the articulation is not selected.
This is a known issue - reported to our developers.
To fix this issue:
Having done this, batch resave this library as this video shows in the earliest version of Kontakt you have installed:
Or, to fix on your own system:
1) Click the padlock in the bottom left corner of the interface and select "unlock artic"
2) Click the music notes symbol at the bottom of the interface to enable the articulation.
3) At the top of Kontakt is a floppy disk icon - save over the NKI from this icon.