Creating working Audio Courses for iOS

Hey there,

when i create courses i always run into the same issue, when using the course on my iPhone:


All these Audio selection Tests are showing the same answer. (created a test for this: http://www.memrise.com/course/1239886/test/)

However when using other courses e.g. (JLPT N5 Vocab - by jlptbootcamp - Memrise) work completely fine.

Am i am doing something wrong?