As I explain somewhere in my web (don't remember where) BW sniffs all notifications but sometimes this sniffer shuts down. Please, try one of those steps:
1) Enter "BlueWatcher Settings" and click MODIFY on Android Notification Settings. Once here disable and enable again BlueWatcher option. Restart BlueWatcher and try again.
2) Restart your phone.
Those steps will re-execute notifications interceptor.