A library always consists of two files. a dcm and a lib file.
You also need to add the files to your project for them to be active.
Read through this old post where we discussed a similar problem to yours (there the poster was searching for the switch lib but everything else is the same for you as well.)
Where are the momentary bush-button switches located? (Ignore the first half of the topic. I confused schematic and footprint libs.)