FB login doesn't connected to K2 User ?

I have an issue.

I want to make only registered user can give comment on the K2 articles.
If new user login to my site (http://www.mahasiswait.com), the K2 doesn't know if they are logged in.
K2 stil close the comment box, although FB user had authenticate their login.

I must change the new user K2 profile manually to make the user can give comment on the K2 articles.

I had set on:
K2 Parameter -> Advanced -> Select the default K2 User Group for new registrations : Registered
but it doesn't work for me.

Sorry for my bad english, PM me if you want access to back-end. Thank You.

Hi

I do not know how it works with K2, You should ask on K2 forum I believe. Anyway have You used a K2 user login instead of a standard one ? Maby this is the problem.