Thanks for posting your question here. The Auctiva scrolling gallery is powered by Flash, which is not currently supported by the iOS operating systems that are used by Apple's mobile devices such as the iPhone and iPad. Therefore, it is expected that the scrolling gallery will not show up when you view your listings on those devices.
I hope this clears things up. If you need any further assistance with your account, please feel free to contact us by mousing over the “Help” tab within your account and selecting the “File Support Case” option.