I am able to log in via Facebook and Google+ as expected. I am having some minor troubles with Twitter that I will explain below. Here are the steps that I took.
1. Log in with Facebook from SCLogin module on the homepage
offyatreerecords.de/
a. I was logged in properly.
b. Redirected to the CB profile page at
offyatreerecords.de/cb-profile
c. Received the message "Facebook Profil erfolgreich verbunden."
2. Logged out.
3. Log in with Google+ from SCLogin module on the homepage
offyatreerecords.de/
a. I was logged in properly
b. Redirected to the CB profile page at
offyatreerecords.de/cb-profile
c. Received the message "Google Profil erfolgreich verbunden."
4. Logged out.
5. Log in with Twitter from SCLogin module on the homepage
offyatreerecords.de/
a. I was redirected to JFBConnect's login / register page as expected, since Twitter does not make the email address available. The user must go to the mini-registration always for Twitter, even if 'Automatic Registration' in JFBConnect is enabled.
b. I entered a username and a birthday and clicked the Register button.
c. I was logged in.
d. Redirected to the CB profile page at
offyatreerecords.de/cb-profile
e. Received the message "Twitter Profil erfolgreich verbunden."
Please note, the first time that I hit the Twitter button and went to the Login/Register page, I did not enter a birthday, but did enter an email address. When I hit register, I got a Javascript error in the console. Even if I filled the birthday out at that point and then hit the Register button again, it would not work. However, I think this is something that you have customized on your page, as we don't offer that birthday field and the Javascript error is something that I have not seen before.
With all that being said (besides the strange birthday error), creating a user through the three different social networks worked for me. I cannot reproduce the error you are seeing with the Facebook login needing to be activated. If you can reliably reproduce this, please provide detailed steps on how to make it happen.
-Melissa