If you haven't had any lookers, the house is over-priced. If not priced correctly at first, the house will linger on the market. Buyers might perceive something is wrong with it.
Are you working with an experienced agent? If so, have her redo a market analysis. The market never remains static--it fluctuates over time. If not working with an agent, by all means, hire a good one who will do a market analysis & price your home to sell.