Slider Set Up

I am receiving an error message when trying to create my home page slider. I followed your steps online as well as the steps to problem solve in the forum, but I’m still receiving the message. I added the text below of the error message in the upper left hand corner. Thanks!

Error Message: Publishing failed. Sorry, you are not allowed to edit the _regular_price custom field.

The page I need help with: [log in to see the link]