OnMouseover Rollover Images Not Working

Hello!

I am creating a custom page template where a block of images make up one big square of content. The center section has sliding images, and the surrounding images are in black and white, and when you rollover them they become bright and colorful and allow the user to navigate the site.

I am able to make the majority of the images rollover, but there are two (small ones, on the left) that do not rollover. In fact, they do not even link anywhere, even though I’ve used the proper tags.

Can anyone help with this?

Thanks!

Here is the link to this page: https://cremedelacreative.com/813-2/