The character falls through the mesh

Hello, sorry for my english, but I need help. I set up the character in the first person, and I have a problem. When I start the game, my character does not walk in my imported terrain or falls through. But the standard model of the character can walk. All the settings of my terrain, and standard models are the same. Attached is a screenshot of my settings terrain and character.e5ebd26f532a1c64d34aa12cdac8a2f48cc817ab.jpeg