Anchoring an Image doesn’t work, try creating a caption or creating an id like this:
from: http://helen.wordpress.com/
Why is the anchor link not working?
The anchor link relies on the ID that WordPress automatically generates when you insert an image with a caption. If you inserted the image manually or without a caption, the anchor won’t jump you to the spot in the page. The ability to specify an anchor may be added at a later time, or you can just add the ID (attachment_##) to the img tag.