Phragmipedium

I have a Phrag. Mem. Dick Clements (besseae x flavum sargentianum 'Birchwood') which bloomed a few weeks ago. It's planted in Orchiata (I'm not affiliated with Orchita in any way other than I use it). The bloom lasted about 2-3 weeks.
Now, the bottom portion of the 'trunk' is turning much lighter than the rest of the plant. I'd not be surprised if I lost it but am trying to figure out why.
In order to reduce stress on it, I cut off the bloom stalk, took it out of the pot, cut off the dead roots and re-potted it, again, in Orchiata mainly because that was all I had as a medium.
It is in a S-S/W facing window with a sheer curtain at the window.
I water it twice a week and give it a plant food with extra Cal/Mag and now since it's Fall, I'll start feeding it only once a month.
I had had a besseae a few years ago which I kept sitting in saucer of water as recommended by the grower but didn't attempt to do that this time as the besseae turned pale, the leaves became spotted, and it died
Might someone be kind enough to help me with this situation? I'd post a pic. of it but my photo sharing program isn't recognizing my camera.
Thank you,
Leeflea.

 

Bonjour et merci d'avoir répondu ...as is evident from my experience with the species obviously for me at least I should stick to the bark media. It seems overnight, almost, it started going downhill. So, if this one dies, I'll evaluate it to see what I did incorrectly, augment it, learn from it and move on and stick to with what I know and that's catts and their alliance. Although this isn't the species for some reason, phrags and paphs are difficult for me.
Again, thank you for being kind enough to respond.
Lee