Have you created an account in the Apps Manager, and once having done that, enter in your information for the specific Facebook app? If you have, don't forget to press the red "A" button in the Internet@TV main-page to log-in and then try launching Facebook.
Does that help?
I am wondering if anyone can enlighten me on the problem i am getting why my Samsung LE40C750R2KXXU 3D TV.
When trying to access Facebook via the App in the Internet-TV i keep getting an error message saying please go into settings and ad your Facebook details for login. I have already entered all this details in the settings but every time i try to go into the app i get the same error.
Any help or suggestions will be much appreciated. Thanks for your time.