some kids just hate them. My dd never took a binkie. she HATED them. I was her paci/binkie/soother. she even learned how to suck with out gettign milk if all she wanted was to suck. at first it was a bit of a pain. but then she out grew it some.
I really couldn't give you much advice but I will say sometimes I wish I were in your shoes. DD does nothing but suck her thumb and she's done it since day one lol. Doesn't want a pacifier but she will suck the hell out of her thumb for comfort.