Titles not working

Hi i've downloaded your demo app and use the example of the top horizontal tab bar on my app but the titles for the models are not been displayed in the app on any of the modes(all and active). Am using the exact example as above only that am not using the tab bar with a viewpager cause i want only the tab bar, I've tried this on your demo app in the same example as above removing the viewpager and it continues to work perfectly showing the titles but on my app is not showing the titles, just the icons. What could be the problem, if you need anything from me let me know. I really wanna use the dependency cause is nice