Thread:Extension talk:WYSIWYG/Problem adding template in MW 1.19

I'm using WYSIWYG with MW 1.19 in here. Because, any users cannot use wikitext. So I finding WYSIWYG editors, and now seeing it works. But there is some problem when I add template. When I add template which is so important for article, it prompt with message box: "Invalid content." But if I add that template in wikitext, it works, but just cannot add / editing template codes.

Do you feel that it's so hard to read? Yeah, I'm Korean, and I've forgot all about English when I live in Indonesia. But I think this bug is truly important, so I ask to here. Thank you for reading it.