Talk to your GI about it, but there is hope - at least the Remicade does seem to be working (at least for a month). The same thing happened to my son. The first thing his GI tried was doubling the amount of medication given at each infusion. When he still couldn't last the 8 weeks we moved his infusions so they were closer together - first 7 weeks apart and now 6.
Don't give up hope! The GI's office told me that a lot of people need to make adjustments with dosage, etc. It doesn't mean the Remicade won't work for you.
Take care,
Nancy (son Ben,14,CD dx 3/06; Remicade, Asacol, Multi-vitamin)