need help with new cattleya

[emg53]

I bought a Cattleya at the Fort Lauderdale Orchid Show a couple weeks ago. It was in a small plastic pot in a clear plastic bag. I chose this one because there was a bloom about to open. When I got it home I repotted it in bark. The roots are not in good shape. I checked it out today and I think they have gotten worse. This plant has 5 pseudobulbs. Two are older bulbs and the other 3 are either in bloom or in sheath. One sheath is dried up but the other is just emerging. All the pseudobulbs are pretty dried and wrinkled.
I took it out of it's pot today and rinsed the roots with hydrogen peroxide and then water. Very few short roots turn green when watered. Most of the roots are soft but not mushy and gray in color. How can I help this plant to survive.