Problem with "Nivo Slider"-"Error: File doesn't exist"

Good morning, everyone.

I have some problem with the “Nivo Slider” on the home page. It keep showing the similar message like “Error: File doesn’t exist: /var/chroot/home/content/38/9323038/html/wp-content/uploads/2012/07//ecog-homepage-slideshow-002.jpg”
I try to delete the plugin and reinstall it several times from godaddy, but it doesn’t seen work. Here is my site. http://ecogboutique.com/. I am wondering if you can help me take a look and give me some suggestion.

Note: I am not a tech person, it will be nicer if I could have a easy solution 🙂 Thank you all very much and have a great day.

Jian