Thank you all.
It is one of my top 10 favorite orchids. Unfortunately most of the growers including myself think it is a fussy plant to keep. It can die in your hand without much of warning. Personally I think this species hates wet feet. Over the years, I have lost a couple of them due to rotting. If your growing area or greenhouse has noticeable seasonal changes(like temperature and humidity), you may have to pay close attention to this species and adjust your watering scheduel accordingly.