Cattleya not blooming and with a black patch on a leaf

[arijitp83]

My Cattleya has suddenly developed this black region. Due to a pre-monsoon depression it was raining for days and the plant was outside. It started as a black spot. Now I have brought the plant inside. Should I cut off that leaf? I have already applied fungicide and it is only that leaf -- its a new growth, the other leaf is still growing.

The plant was doing quite well outside in the sun and as you can see in the pictures there are many new growths. Its been only growing since I bought the plant in 2008 and did not flower yet- I do not know why!

Can anyone help me and throw some light on the above issues.