Potty training Chocolate lab

I have a 14 week old male chocolate lab. I have had him for about 6 weeks. I’m super lost on potty training. I have a female chocolate lab from the same breeder and had no issues. The 14 week old constantly uses the restroom in his kennel. He is never in the kennel for more than 2 hours at a time. I’ve tried using a divider, he will lay in it. Tried feeding him in the kennel, taking him out every 15 minutes, Taking him out, waiting for him to go, bringing him in and not even 5 minutes later he will go again. He never goes in the house, only his kennel. I work from home so I am able to take him out non stop but this is getting super defeating & frustrating. I am cleaning with an Enzyme cleaner and following all instructions on the bottle. Any tips would be appreciated.