My boy is now 2yrs. & 4 mos. old now. Let me tell you I had a hell of a time trying to train him. I did everything by the book, out every half hour, lots of praise and treats, crate training, ...etc. You name it, I did it. But this little guy just couldn't quite get it right. He would go for about a 2 weeks, fine... then bam!...back to square one. But through many frustations, tears, vet visits, tests....we finally got through it, and yes he finally got it. So what I'm trying to say is..have patience... he will be potty trained when and only when he truly understands....It took us 2 yrs...but he his finally figured it out!!
