Images Not showing

Some images in my wp-content/uploads are not showing, neither in the browser, nor in any other place. Please note that this happens only for some images, not all.

I am getting a 404 error. Please take a look here: https://www.planstoprosperity.com/wp-content/uploads/2011/facebookfanpage1.jpg

On a different image if I type the URL without “www” I can see it in the browser. But If I type the URL with “www”, I cannot see it. Here it is: https://planstoprosperity.com/wp-content/uploads/2011/Optin.jpg

Another thing is that, even if I try to type the URL for the first image without “www”, the “www” gets automatically appended in the URL. This however do not happen for the second image.