images not showing up in Internet Explorer

Hello,
I just joined the other day.

I just completed a site but some images do not show when viewing the site on IE. All the images show when viewing on Chrome or Firefox.

I went to IE and cleared the browser history, but the images still are not showing.

The site is http://www.signaturesupplies.ca/

The 2 images that do not show are the ones under Latest Post, which when clicked goes the the individual blog post and the image does not show in the blog post. The image is loaded as a Featured Image.

Thank you for your help,
Agnes