Microsoft Movie Maker animation transitions

I'm having issues with Microsoft Movie Maker for Windows 7.  It has decided it won't show any of my animation transitions. I have uninstalled it and resinstalled & had success with it working again for a short-time then it just makes them all disappear again.  I have the latest version of movie maker, I'm up to date on my video drivers & windows updates in general to my knowledge.  I don't know what else to do...anyone else had this problem and been able to fix it?