leakages from ostomy appliance

I have had my ostomy for 1 year and 9 months and during that time experienced many problems with leakage. I tried all different appliances and the most reliable was a convatec convex two piece but then even that gave me problems so I tried Cymed. It is microskin and conforms to your body shape like nothing else. You can go to cymed-ostomy.com and read about it. It takes a few times to apply it properly but once you get right it's very easy to apply. I do not use any powder, cream or anything.
Jean

My husband is 4 months post surgery, for the removal of the bladder and prostrate{ bladder cancer}. He has tried several manufacturers, who make ostomy bags, and yet he still tends to have leakages from the bag. Any suggestions, solutions, ideas why this could be happening?He now wears a hernia belt around the bag.