lorax - 11:26 am on Oct 3, 2011 (gmt 0)

Geesh. Since you know the path directly to the image, can you view the image using the path instead of using WordPress? If you can, then you are having some form of WordPress issue and may want to bring this up on the WordPress support forum instead. If you can't, then it sounds like you're having some form of server issue and will need to speak with your host about the issue.