Hey there, Hmmm okay the knee was classically a problem in the original Koshini file and one of the updates, however the current update that Daz has onfile should take care of this problem. If you purchased before April and you didn't download the fresh exe from daz (requiring a password to access, not from the web page link) then you'll probably need a new copy. Just ask them, they'll have the purchase on file and will get you a new download promptly. If your still having problems after this, please feel free to contact me. We'll see what we can do to fix it up. Littlefox