My husband and I have being together since my daugther was 3 months old,my ex had walk out on me my husband have raise my daugther ever since,now he wants to adopt my daugther,she 11 years old, we live in Florida and come to find out my ex is not her natural father by dna testing but he's name is on her birth certificate,he refuse to sign any papers to give my husband rights over her, he lives in mass he doesn't call, my daugther has never seen him in her life.how do go about this .

You need to get an attorney to file the adoption petition. The attorney will advise you of what options you have for getting the legal father (and your ex is the legal father) to relinquish.