So I saved it to documents and I finally got the internet back on today and posted this. It only took 2 1/2 hours, my neighbor Robert (who is much better at this than I am) dropped calls and calling back, running through all the tests and jumping through flaming circus hoops, getting switched to a 3rd party service provider and starting over with all the tests and turning this on, turning this off, deleting this and that, restarting and all the fun computer exercises they could think of. Finally, it came back on. So here is what I wrote Saturday.
Winter rye roots can go really deep, like 3' or so. I wonder what your soil is like at that depth? Still all sand?
If you are planting winter annual rye grass, it won't get tall but the roots can go 36+" deep. Try cereal rye for height.