Word 2010 Beta Language proofing

Hello, I really don't know where to wirte, so I hope this will do.
My problem is, that, when I go to Word 2010 Beta options-Language my first
language – lithuanian is enabled and default, but in the "Proofing" section
it says, that it is not installed and sends me he
http://www.microsoft.com/downloads/d...displaylang=en
But even when I install the language pack, proofing doesn't apear in the
language menu. I don't know what's the problem, because in older versions
(like 2007 word) proofing was always installed and on.
How do I enable proofing in lithuanian language?