Freddy is doing the same thing, he runs up the stairs and is scared to come down. ( i have to admit our stairs are pretty steep) He is 17 weeks. I have to carry him down all the way. I was playing with a beamer last weekend and he followed that little red dot down the stairs
unfortunately he couldn't remember later on that he did it and was sitting on top crying for somebody. Yesterday i went down the stairs and was holding a toy for him to come...i knew exactly that he wanted to come and get it but was just too scared to go down the stairs...so i took him to the middle of the stairs and he ran down without a problem. It is not a big deal..i just want him to be able to go downstairs when he needs to go potty.