Please please please try what I did; I used something called Culturelle (you should be able to buy it at any drug store; if not, they have a website: http://www.culturelle.com.
In combination with that, I used something called Florastor (www.florastor.com) - the two combined CURED my colitis - haven't had one episode (knock on wood) since I began this in October. Now I just maintain my digestive health with a really good quality probiotic - good luck to you -