Dying phal - help!

[leen]

Hi there,

My phal is dying, with yellow limp and mushy leaves. It begun dying yesterday when a perfectly green leaf fell off! i checked the roots and realized there was mold! so i wiped the crown and roots with isopropyl alcohol and sprinkled some cinnamon on it. and today, all the blooms are wilted so i snipped the flower stem (sorry, don't really know the correct terms) completely at the base. the remaining two leaves are beginning to get mushy as i can see some dark water patches. my phal is potted in bark and i had only watered it once a week. it is placed in a north facing room in front of french doors so there is plenty of indirect sunlight. could this be a problem though? there is no direct sunlight coming into the room so the plant is not absorbing enough heat or something?

what could be the cause of the mold? and is there a way to save my plant and the wilting leaves? i read about "sphag and bag" method in saving a dying plant. does it work and can someone give me more information as to how to do this? i don't want to give up on it and it's painful to watch my phal slowly die.