I am scheduling posts every three days to be posted in Facebook, Twitter and G+. The posts have images. When the thumbnail is generated in Hootsuite, the picture doesn't show in it. At first, I thought this happens because the fact that the posts in my blog are scheduled as well, and I thought the images will be visible in the social media selected as soon as the post will be live. It didn't happen. So, I tried the other method of uploading the image to Hootsuite and schedule, hoping it will show up. It didn't. So, right now, I have posts posted through Hootsuite but without images in Facebook and G+. How can I fix this?