Problem with a dynamic scroller

Hi i have a dynamic scroller that loads in txt files. and my problem is when i try to copy this scroller in to another fla document, i get this text in my output window:

Error Scene=Scene 1, layer=script, frame=1:Line 2: There is no property with the name ‘UseCodePage’.
System.UseCodePage = true;
Total ActionScript Errors: 1 Reported Errors: 1

What do i wrong?..what is UseCodePage?