I cannot pin images from my own sites

I host three sites through InMotion. All three are wordpress.org blogs using different themes and different plug-ins. The only thing that seems to be the common denominator is that they are hosted through InMotion. In the last few weeks I've received messages that whenever someone tries to pin an image from one of my blogs they are told that pinning is not allowed from the site. I know I didn't change any settings (let alone settings on three sites) and after attempting to contact the theme developers and various plug-in developers on Wordpress they have suggested I try contacting InMotion. I called support and they didn't have any help so I'm hoping someone else is experiencing this problem and has a fix! The three sites are http://*****.com, http://*****.com, and http://*****.com. Thank you!