Surprised that no one answered your post....maybe something to do with typing stuff and "puff its gone" but the forum seems to be working normally this morning.
Anyway, one of the parents of Dan Rosenberg is Phaius tankervilleae and quoting from Native Orchids of Australia.....
"Notes: This species grows in moist to wet habitats, particularly permanent swamps where it may occur occasionally in extensive patches in black peaty soil. It also colonises localised depressions and soaks in open forest and grassland and is occasionally even found growing on well drained sites."

I haven't got one because it grows too large, but if i did i would be using Cymbidium mix as a potting material, failing that, fine treated bark. .

If you have had the orchid for four years maybe it needs dividing?

Thank you for your post! I wondered if I had said something wrong in my post--LOL.

I re-potted the orchid! The roots were wound around the the pot really tightly... I spread them out and added a bark mix that had fine soil in it.I have been watering it a little more often. I was amazed at how quickly it responded to my efforts! It's been a week, the older leaves have perked up ALOT and the new growth looks great!After it finishes blooming, the next time, I will place it in a much larger pot. Need to find a new spot for her.. Thanks again for the information and suggestions.

I grow mine in pure sphagnum moss with some Dynamite mixed into it. It will e more like what the parent is used to grow in