Have you been tested for pouchitis? Maybe you have this and need antibiotics.
Another thing to try is a prescription cream (at least a prescription is required in Canada) of Nefedepine or a Nitro based cream. I tried both in the past, but could not tolerate the Nitro based cream and it can gives head-aches as a side effect. Nefedepine based cream helped me a lot (just make sure you are not allergic to any of this stuff).