Updating dreamweaver library items --> Simple question

Thanks for reading. I have some pages with library items in them. When
I change the original library items, and Dreamweaver asks me if I
would like to update the pages in the website, I tell it ok. But it
won't update my .xsl files. Although I can open and edit these files
in Dreamweaver, I can't automatically update library items in them. Is
there only a limited number of extensions that support library
automatic updating? I am using Dreamweaver Ultra Dev 4. Thank you very
much!

Gene