Troubles Potty Training Cocker Spaniel Puppy

Sadly, our blue Dobie passed away. We decided on a smaller dog, so we purchased a 4 month old male cocker spaniel.

Every dog we have had we have been able to potty train them within a few days or so, but our little Snickers is not so easy.

I was told to crate train him, because he was so wild, pooping and peeing everywhere, even though I take him out every two hours during the day and 2 to 3 hours at night.

The crate is wonderful not having to chase him constantly and he is comfortable in it. But still I will take him out and he will do his job a good percentage of the time and no sooner get in the house and he does one or the other.

I take him out to the same place and tell him to potty and praise him. He doesn't get as much exercise as I know he should because it is winter and 0 to 20 degrees.

I have read Ceaser's books and have been researching.

Trying to teach him to sit and stay is also going nowhere and I am a quite patient and persistent person. Do you have any suggestion for me?

He is absolutely not interested in treats when I try to reward him with them outside. I walk my other dog faithfully, winter or summer, wondering if coat and boots would be okay, or if he is still to small for such cold weather?

Any other tips or suggestions will be much appreciated.