I think you probably did all the right things, Anita. Sometimes, for unknown reasons, our orchids simply die. The younger the plant, the fewer the pseudobulbs/canes, and the fewer the (healthy) roots all lend themselves to failure. Physan won't really reverse plant health problems, it is more of a preventative. I don't grow Cymbidiums but I am quite sure there are many ATP subscribers that do. Perhaps they can tell you more about your plant's decline.