It's a different market for sure. Strategies, as good as they are, will usually (barring condition, location issues) will get down to pricing and no matter how much advertising done, there's still apx. 67% of the homes that do not sell because of supply and demand.
It's not like you purposely did something 'against' the agent. I agree with some of the other responses about possibly offering something for the time, costs and efforts. There is one thing that many sellers don't know. We spend a tremendous amount of 'behind-the-scenes' time (hours and hours) in everything involved with listing and marketing a home. Sometimes you only see what you think as 'nothing much', but was a lot of work. Contracts, market analysis', research, pictures, marketing brochures, ads, signs, office documentation, internet marketing, updates, verifications and more don't just magically appear from nowhere.