Executive search firms need a good resume from you, but they also must have a search assignment that matches your background before they can be of service. Headhunters do not market you. They find the best candidates for client job openings. Their clients are companies that pay their fee or retainer. Don't expect a headhunter to make you her number one marketing project. Conducting your search campaign isn't her job, it's yours.

My first six years in the business were hopeless. There are a lot of times when you sit and you say "Why am I doing this? I'll never make it. It's just not going to happen. I should go out and get a real job, and try to survive."
George Lucas

Nothing is particularly hard if you divide it into small jobs
Henry Ford