Datagrid not working when not in 1ste frame


I am new to Actionscript and currently trying to integrate some datagrids in a Flash movie.
The problem i am encountering is as long as the Datagrid, XML connector and Dataset are in the first frame and first scene of the movie everything works fine; but when moved, for example the to 5th frame or another scene, the datagrid does not seem to work at all anymore.

How do I make a datagrid working that is not placed in the first frame of the first scene ??

Thx in advance.