Now I really wish I still had the box so I could check the expiration date. That would make so much sense since I bought a two-pack kit, so if one was expired, they both would have been. =/ Oh well. Third time's the charm, I hope. Just gotta keep going until I get it right.In that case, I wonder if your relaxer was expired or left sitting too long after being mixed before applying to your hair? I can't imagine what else would cause it not to work.