Actionscripts works at school but not at home

I created a simple 3 buttons program using actionscripts 3.0. When I do a Control/Test Movie, the program runs throught the functions of the 3 buttons and repeats itself. I can take the same file to school and do Control/Test Movie and now the buttons work as it is suppose to. At home, if I do Debug/Debug Movie, I get a message that says "You can not debug this SWF because it does not contain Actionscript" but I can run it on the system at school. Am I missing some settings? Running XP, Flash CS4