sermon images

Thank you all for your hard work on this plugin. I just transferred over from sermon browser. Mostly things are going ok. (the verses didn’t transfer) However, I would like to change the size of the image on the sermons shortcode to wider. I have tried all kinds of variations of the shortcode.
[sermons image_size=”sermon_wide” per_page=”20″]
I’ve also tried sermon_small, full, large, etc.
Nothing seems to change the size of the image for me so I’m obviously doing something wrong. Thank you for your help.
One other thing, should the [list_podcasts] be showing an image for the itunes field. It is just a blank purple box with some text in it.
Thank you!

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