Cannot see the tiles in a script

> Dear List,
>
> For some reason, I cannot see the tiles in a script that I created.  
> Normally, if I pull out a script tile from the Scripts category in  
> the viewer, I get to see the tiles inside the script . But, I have a  
> script that does not show the tiles when I pull it from the viewer  
> because it remains as a single tile showing only the name of the  
> script, not the contents of the script. Since I cannot see the  
> contents of the script, I cannot modify it.
>
> Can any one explain why I got this problem and how to solve it?
>
> Thanks in advance.
>
> Young-Jin
> _____________________________________________