Logout link @Facebook

I;ve install facebook opengraph plugins on my site here http://wadiilmu.iamsumri.com.
Everything working just fine except one thing. I cant’t logout using facebook connector sidebar (when logged in using my WP users). But if I connected using Fbook login, there’s no problem with logout link.
pls refer this image for reference : http://i281.photobucket.com/albums/kk203/husinlempoyan/wpress/tshoot-logout-not-working-01.jpg (refer red live in the picture)