unfetchable URL Images 403 forbidden

Hi all,

    I am facing this problem for few months any URL images from profile image to blog_tools image anything that goes in to serve-file url i am getting a 403 forbidden error i don't know why i am getting this error.. bcz of this any blog image or profile, group image is not getting rendered in social network site.. 

Performance and Scalability

Performance and Scalability

If you've got a need for speed, this group is for you.