Plugin not activating proeprly

I’ve installed and activated the Custom Admin Text Change plugin. For some reason it is not activating properly. I don’t ever see the ‘Text Change’ option under ‘Settings’. I’ve also noticed that even though it shows up as installed and activated in ‘Plugins’, it does not show up as installed under the ‘WPMU DEV’ section under settings. Am I missing something?

WordPress v.3.2

BP v.1.2.9.