I have done all SEO but I am still not receiving any traffic from image searchengines.Why? http://snhclick.com?

[Jake]

I have to believe it's in part the overly clever interface, you can't click a link until you roll over something, the search spiders may not be able to expose the links to inner pages (I didn't peek at your code) you absolutely need a site map (I didn't check) providing an alternative, conventional menu link based main menu may be wise, perhaps activated with a "Simpler Menu" link.

Your other big issue is there appear to be no text attributes assigned your individual image pages, Google Image Search is based on identifying keyword phrases that match an image, generally based on the file name and the alt text of the image, your example:

The file name: DSC00049-700x525.jpg

Aside from using descriptive file names and alt text to indicate what the image is, the anchor text in a conventional Simple Menu also provides one more descriptive keyword that might be associated.

EDIT - I had been examining the actual image in a window and not your post page for the photo, I seen the embed image line in wordpress looks like:

<img class="attachment-single-thumb wp-post-image" width="667" height="600" alt="graveyard" src="http://snhclick.com/wp-content/uploads/2013/02/DSC00039-667x600.jpg"></img>

And does have an alt text "graveyard" which should be helping ranking a bit, again I believe you have control of the file name when you first import the image into the wordpress assets. (Unlike some systems like facebook where you are stuck with their cryptic file names) the text appearing on the same page as the image may or may not have an effect on the search matches in image search. (Providing the spiders are getting to your pages)
The right tracking software like Google analytics should show you where the spiders have been, after you get good at identifying these search agents.