You might have deleted the opera 6.0 directory in
/Applications/Macromedia Flash MX, which it uses to display the
xml-based help content.
If you have a copy of Dreamweaver MX, then copy 'opera 6.0'
from /Applications/Macromedia Dreamweaver MX 2004 to your Flash
Directory. If that doesn't work you may be missing the content from
/Users/Shared/Library/Application Support/Macromedia/Flash MX