You are downloading the Flock XAP file v18.104.22.168 for Windows Phone. Flock is a free and useful Productivity app: nFlock is a simple, FREE messaging app built specially for teams and small businesses. KEY FEATURES - Simple setup, NO IT-ADMIN REQUIRED ... You can now download the offline XAP file to install & try it.
Download Locations for Flock 22.214.171.124 XAP file
Important Notice: Now Due To Unspecified Limitations, You Can Not Use The Offline XAP File To Install It Any More.
To try to install it manually from an SD card, you should choose one of the server location above to get the offline Flock XAP file, move the file to your phone's SD card and then tap 'Install local apps' in the phone's App list.