why did my logistech keyboard sophisticated working with my galaxy 4

[AC Question]

I have a solid green light and Bluetooth is on.

 

[B. Diddy]

Welcome to Android Central! Which Logitech keyboard model, and which Samsung phone--S4, Note 4, Ace 4, Tab 4?

Have you already tried forgetting the keyboard on your phone, then going through the pairing process again?