Symbol properties window don't show symbol scripts

Hi,
I have a problem with the symbol properties window: I created a symbol, save it into common library and created script located in common library. After that I selected it but it's still empty.
I tried also to close and open FW, close and open the properties window and restart the system.
I'm using Fireworks CS6 trial on my macbook pro (Macintosh OS X Mavercks 10.9.5) and there are no others application running.
Do you have some advice?te

Thanks,
S