I got it to work by merging my primary email address and apple ID so that my apple ID is now my primary email address.
You can do this by visiting the link that khmiakiew provided:http://www.apple.com/iphone/find-my-iphone-setup/
Find my iPhone is now working for me using this solution.
can anyone help me?
Have you tried double checking your account to make sure your email address has been verified. Also you may have to merge your email address with your apple ID in order for it to work. When you log in to your account at the above link it will give you the option of doing so.