Because Adobe has discontinued support for CC 2014, the activation servers behave differently today than they did in 2014.
Once activated, make sure the software is running at peak performance: Adobe Photoshop CC 2014 -32 64 Bit- Activation
While you don't need to be online constantly, the software requires an internet connection periodically (usually every 30 to 99 days) to re-validate the license. Because Adobe has discontinued support for CC 2014,
Common activation issues and their solutions: Adobe Photoshop CC 2014 -32 64 Bit- Activation