Facebook Error if try to login - Email already registered

Hi,

We are using latest JFBconnect. It was working fine before we upgraded it to the the latest version.

Right now connection using Twitter, Linkedin and Google is working fine. But the FB login is not working.

When we try to login using Facebook it gives error:
This email is already registered. And redirects to Registration page

Previously, it was automatically logs in the user if user is already registered.

Other Information:
JFBConnect Debug is already set to "Enable Debugging"
* Is that happening with all users that try to register with an already taken email, or just with one account?
>> It is happening with all users who are registered with us using Facebook

* Do you have the "Automatically link users by email" setting enabled or disabled? That will help narrow down what JFBConnect could be trying to do.
>> This is enabled as user may login using Facebook, direct, or other social networks which may have same email ID.

* Website URL

Please check and help to fix this issue. Thanks

Regards,
Prashant