[yavenay]

It sounds like you are doing the right thing. Like others have said, he will eventually get it. Limit the amount of freedom in the house until he is potty trained. Some people like to use the the tether method. They tied their puppies to them so if the see them squatting to take a pee they can quickly scoop them up and take them to where they are supposed to potty.

Others use the crate method. They keep the puppy in the crate and let them out to potty. When they are fully potty trained they get more freedom.
Both methods restrict freedom.
Duchess is potty trained and now has run of the house but when I was training her, she was only allowed a small area to roam in.

Also for letting you know, you can always use the bell method. Place a bell on the door where you take the little one out to potty. Every time you take him out to potty, hit the bell or take his paw and hit the bell and then once outside say "potty" or something similar and then give him a treat. Over time he will begin to associate the bell with potty and he will start to hit the bell every time he wants to go potty. Be warned though, if you are using the treats, he may hit the bell just to get the treats and not actually have to potty.