Jumellea comorensis . . . HELP !

[NeoNJ]

I have (2) Jumellea comorensis plants, both potted. I can't seem to find a whole lot of information on these orchids....

My problem is no matter what I do, they react negatively. The leaves are turning yellow with blotches of green/black/yellow .... so I don't know if they are getting too much light, or too much water, or not enough water or not enough light.....

No matter what I do, the leaves keep turning yellow. I had them under lights, than moved them to more Shade, and still the leaves are reacting. I water them, let them dry out a little, and still have the same problem ...

Does anyone know anything about the culture requirements for these Jumellea ??? The information contained in the book "Angraecoid Orchids" is very vague .