I am running rails on a local server on windows. I installed wkhtmltoimage to C:/Sites/wkhtmltoimage

Now I have to tell IMGKit where to find it, so I added a file initializers/imgkit.rb:

IMGKit.configure do |config|
  config.wkhtmltoimage = 'C:/Sites/wkhtmltoimage'
end

But When I try to use IMGKit, rails tells me:

No wkhtmltoimage executable found at /usr/local/bin/wkhtmltoimage

But I set up a new path for it ?

What do I have to do now ? Please help.