housebreaking

Hi. Thanks for all the info on the diahrrea questions I had. Now I have another. My doodle is 17 weeks old. Still having accidents in the house. We take him out at least every 2 hours. He gives us no, I mean absolutely no indication of when he has to go, just stops what he's doing and goes. Very frustrating. Trying to maintain an even keel, but, he is literally peeing all over the house. It would be understandable it we were ignoring signals he's giving, but, I really don't think we are. I am with him all day, he's not left alone. I now believe he knows when he's doing wrong, but, still...
If anyone out there can give me any insight on this, please do. I've been reading all the entries of how everyone has their dog house trained by 9 or 12 weeks, if this is true, we obviously have a problem here. Please help!!!!