FB connection to candy crush

Today I lost Candy Crush FB connection on my iPhone and iPad. I deleted the app from my iPad and reinstalled it using FBI. I am now back to Level 1 rather than returning to Level 327. I kept my app on my iPhone where I have maintained Level 327 but am still unconnected on my devices. I think that once I am reconnected to FB I can recover my level on my ipad. But how do I reconnect? I have tried everything in my Settings.