My son, 18, also has AS. It took about 6 doctors in 3 counties to finally find a Rheumatologist that said "this is a classic case of AS". He is starting my son on Enbrel, methotrexate, and folic acid. He also ordered a colonoscopy and had a bone density test done, plus more blood work and xrays. It took 4 years to find this doctor. His name is Dr. Neuwelt in San Leandro, California. His # is 510 357-1303. He is a blessing to us. He is proactive. He has asked us to go to a medical conference because my son is such a classic case. He wants to teach other Rhuematologists how to recognize early the symtoms of AS. My son seems to have every complication of AS unfortunately. How long has your child been on Enbrel? Do you know why it quit working?