All of the physical advise you have been given is sound (don't drink with meals, get a fill etc.). It sounds to me that none of that is really your issue. I know it is often tough for us guys, but have you considered getting some outside help? Counseling is a great tool to help us first work through emtional issues, and then make the resolve needed to carry through.
The band is a tool, a pretty good one for manageing weight, but only after the commitment t use the tools has been made. I do pastoral counseling work and can tell you that many many times all I really do is help the folks I work with focus their attention to the things that really matter to the, and then brush away the chaff.
I doesn't mean your defective, crazy or weak to get help - it just means that you found something you can't do alone. Consider getting some help, I'll bet that your band clinic can give you some low cost refferals.