[Plugin: Instapress] no slideshow in iPhone view

I have it imbedded in a post and not in a side bar widget. When I view the images on the iphone 4s there is not a slide show available I need to select the back button to view the next image and then select that to see them larger than thumbnail size. Is there a setting I can change? I did make the selection to keep it operable for responsive pages.

Thank you.

http://wordpress.org/extend/plugins/instapress/