I had a mature henryi which started doing the same thing.Every year it got worse and after the second year of doing this and cutting it back it did not return.I was so disappointed it was really beautiful in bloom.I have no idea what caused this problem since I have many other Clematis which are still thriving.

I have lost many clematis plants and they were almost always the youngest ones, but I have also had many more come back after I thought they were dead. I always give mine at least two full years before I declare them officially dead, and have still been surprised sometimes. Don't give up on Henryi yet - it may still surprise you!

Thanks! I am stil hoping for the best. It did have a great root system (as it was from Brushwood) lots of foilage, and I did make sure to bury the first set of nodes. So, you never know!
Last year plant Crystal Fountain last spring, and accidentally cut him down to a small 6 inch stump with no leaves last year, and he came back with a vengence! And that was a new plant too!

Give it a shot of fertilizer, it will probably be fine. I've never had one actually die other than ones that were received DOA or almost DOA from mail order.