Barry is pretty close. I noticed the Caddis were sitting pretty low on the water surface, where as my X-caddis fly was riding taller. I pulled out my .89 cent toe nail clippers from Walmart and trimmed a way a small bit of the elk hair wing and completely removed the shuck. These small changes made my fly more effective, and I caught fish for a bit. Then a strong breeze blew up and the Caddis flies where gone in a flash. It was a nice day on the water, made better by being able to noodle out the problem.
On this particular day I only had X-caddis patterns in my fly bow. I had left the fly box with the elk hair Caddis at home on my fly tying desk. If I had the elk-hair with me I think I would have had the same problem, and the same solution. Trim the hackle from the bottom of the fly and remove some of the wing.
Thanks for responding, no prize offered, just part of the learning process.
