problem with IncludePlugin

[Sonda]

I think that the answer to this question will be quite predictable seen the troubles affecting TW nowadays, but maybe someone has already found a solution.

My problem is that the IncludePlugin* (http://tiddlywiki.abego-software.de/#IncludePlugin) is not working: all the external TWs are marked as "loading" in the IncludeState tiddler. 

Is there a solution working with Firefox 16 or later? Maybe an alternative plugin?

Thanks!

*[IncludePlugin is a plugin that allows you to include other TiddlyWikis in your (main) TiddlyWiki, link to included tiddlers, view them in your (main) TiddlyWiki, without opening another TiddlyWiki. Even „search“ looks for included tiddlers. A great way to share tiddlers, to speed up "save changes" and to keep your TiddlyWikis small.]