I know I am way late to reply, but I had a RV Fistula (3 years last December). No medications cleared it up (Flagyl, Cipro, Remicade, etc.). I have not had a flare since starting Remicade in July 2006, and because the fistula was not causing serious issues, we left it alone. The drainage caused a severe pelvic infection at the end of last year, so we did the plug. It came out 2 days after the surgery. The tract for mine is very short and so the likelihood of it working was apparently not very good. However, my surgeon has pioneered a new version of the flap, taking tissue from outside into the rectum while keeping it connected to blood supply. Even though my Crohns was not active, the disease had injured the tissue inside, which is why the flap has had a lower success rate in the past. I am proud to say that finally (4 weeks later) my fistula has closed. I had resigned myself to living with it and I just hope his new technique will help others feel better about
themselves like I do. Only downside, I got a stupid Crohn's flare after the surgery so it took a little longer to heal, but even that is getting back under control thanks to my Remicade.
I hope you find something that works for you!