We are having problems with questions in our flash training material. The material works fine in flash until it gets to the questions page that doesn't load for some people. It works fine for most and I'm unable to replicate the problem.
I don't think it's the exact browser version, operating system or flash player version as we have had many problems with all different versions.
but check the coding for the 'questions' 'page', as that seems to be where it gets stuck. is the 'page' an external swf being loaded, a loaded library asset, or is it a frame that is being navigated to on a timeline, or some other manner or creating a 'page'?
other than that,you need to test test test until you can reproduce the failure, or else be sure that it works just fine.
as a matter of course,test on several computers and devices, several platforms, and of course all the popular browsers, including older versions.