User Aircraft Labels: How do I view them?

On FSX, in the settings under "Graphics", I click the "User Aircraft" checkbox to view my aircrafts' labels (The colored text above a random airplane in flight), but no text appears above my aircraft! How do I make it so that text appears above my aircraft? I've tried everything, but it still won't work! Is there some other solution that I haven't come across yet? 🤔