Problems with full screen image view

(I posted a similar post before but failed to follow up on it - apologies). I have been playing about with image galleries - I’m trying to create something similar to an iBook but something which will be multi-platform accessible - it is a resource for schools and I had hoped to create each separate chapter with hype and then link them all together - anyway - I have an image gallery with a full screen button with each image. When loaded into a basic html file, the function works, but when I try it within a html widget in hype - it doesn’t). Any suggestions - I have uploaded an example. (953.2 KB)