What do you mean with don't show up?
Do you mean if you open the lib with the footprint editor they are not in there?
- (Where did you get your capacitor_tht lib?)
Do you mean when using cvpcb they are not in the list of suggested footprints for your capacitor symbol?
- (check your filter settings)
Or is the lib completely missing?
- (Add it to your installation using the footprint library editor)