When growing with seeds mix ups do happen. You can try to flip her and see if she will start to flower. Other possibility is she may not be carrying enough ruderalis genetics to auto flower. Cut her nitrogen down, 12/12, then once she starts to flower and stretch use your bloom lights. I've come across a couple of diaries on GD of growers who have tried to force their auto plants to bloom with no success one is in a perpetual state of veg. Hope she'll bloom for you.