ask for login username and pass

Error

* Username and password do not match or you do not have an account yet.

Message

* You were successfully logged back in using your Facebook credentials


these : when i try to login with my facebook account., the facebook login through joomla (wiht jomsocial) is successfully, but * Username and password do not match or you do not have an account yet.

when i try to go bact to the the site url its said : (firefox browser) :

Redirect Loop
Firefox has detected that the server is redirecting the request for this address in a way that will never complete.
The browser has stopped trying to retrieve the requested item. The site is redirecting the request in a way that will never complete.

* Have you disabled or blocked cookies required by this site?
* NOTE: If accepting the site's cookies does not resolve the problem, it is likely a server configuration issue and not your computer.

what wrong to that site?

i get this error as well.

when i view my website without logging in to facebook, then open a new tab to login to facebook and refresh the website page, i got this error.

after I changed the setting to do not auto login, I can view my page BUT I cannot login using facebook.

think i know the error.

go to extensions -> Plugin manager ->Authentication - JFBConnect Facebook and enable it.

I did that. seems to work. I found out through the overview part of the component.