Calling a document function at the document level

I am having trouble calling a function from the document level. I wrote a document level function. Then I created another document level script that would call that function every time the pdf opened. However, acrobat (Not livecycle) keeps telling me that my function is not defined.
 
The kicker is that if I call the same function, in the exact same manner from a button - it works fine.
 
What is going on here?
please help.