Unless you add more diagnostics to your app (such as describing what your code was doing) it's difficult to narrow this down to a solution. It might be reasonable to assume that your crash is related to missing dependencies rather than just a bug, so if it is a dependency then is it trying to use VLC or Acrobat? If you're sure that the problem is a missing dependency then use the dependency walker (www.dependencywalker.com) on the controls to see if there are any redistributables that you need to add that are not already part of the operating system.
It could be something totally different of course - ActiveX controls need registering and you didn't say anything about how you actually installed and registered the controls. Are they registered?