Well its sounds like you have a bit of a bump in your weight loss road, have you discussed with a doctor what would be the best forms of exercise with the least amount of impact on your condition? Also maybe look for a support forum for your condition also and ask around on there what other sufferer's do to help them maintain a healthy life.
I wish you all the best sounds like your really trying hard!
SW: 99.9kg ( how close was that to triple digits) 4/11/08
CW: 72.2kg 20/06/09)
GW: 60kg ( Will re-evaluate then to see if I want lower)