We have read many posts like yours. You might want to do some searching on Trulia for different takes on your situation.
1. My rule of thumb is ten showings or two offers in two or three weeks, or lower the price by 5%.
2. How many homes, like yours, have sold during the last six weeks?
3. How many homes, like yours, have gone into escrow in the last six weeks?
Please respond, and you will amazed at the information.
If you do have a Realtor marketing your home, it is most likely overpriced. In some areas, even the lowest priced listings are still overpriced. If you're not getting any showings, that is the most likely issue.
I agree with Stephanie that you do want to visit with your agent and review their marketing plan. If it does not include a heavy emphasis on internet advertising, you're missing 90% of the home buyers out there.