Help with Dendrobium Orchid

[OrchidEye]

Hello - i'm new to this board, and pretty new to orchids.

Anyways with my new obsession with orchids my girlfriend just bought me a dendrobium. I'm not sure what type. It was in pretty bad shape when I got it, the flowers were really droopy and the bark was extremely dry. So i watered it with a very dilute fertilizer (20-10-20). Anyways the flowers are looking a lot better now and the last bud is very slowly opening. However, over the past few days the top leave on the non blooming stem is turning yellow and brown. I also notice that a few of the roots looked burned at their tips.

Now, i'm not sure if I should keep watering it or not. I'm not even sure if it's a decidious type dendrobium or not.

Help me out..

Here's some pictures of it.


http://img.photobucket.com/albums/v2...DSC01804-1.jpg
http://img.photobucket.com/albums/v2...s/DSC01806.jpg
http://img.photobucket.com/albums/v2...s/DSC01803.jpg
http://img.photobucket.com/albums/v2...s/DSC01800.jpg