Miltonia question

[DDP]

Okay...I have never posted to the Orchid Board so I guess now is the time. I am a novice orchid grower and have spent the last few months raising my orchids via the trial and error method. I have used this site to gather a fair amount of information and certainly value it. I have a question (one of many that are sure to come) regarding a Miltonia roezlii. The tips of the leaves continue to brown and spread down the leaf. I cannot determine what I might be doing wrong. I water it when it is dry, it lives on my covered lania in Kihei, Maui so it gets a fair amount of shaded light. I got it as a gift in July 2006. At that time it had one beautiful and fragrant bloom. Since then, it appears to not have grown and the tips of the leaves continue to brown.