AS3: Using objects when accessing a public function problem

Hi people,

I have (may be a simple solution needed) a problem with a class I’ve wrote. I’ve wrote a class named Navigation (code: http://pastebin.com/m1858bb23) and in there I make all the buttons for the navigation. Next to that I have a Ipage class (code: http://pastebin.com/m4a081551) and in there I have all the pages stored. When I click on a button, the Navigation Class is called and tries to access the public function ChangePage in the Ipage class. In the ChangePage function I trace if the function is called and the trace comes back. So it works… BUT if I want to access another object it’s not working. I can’t even set sprites on visible = false. Can someone tell me what is going wrong?

Thanks in advance!

Bye Jessica