Are you talking about the data being pulled into JomSocial? Make sure the "Enable JomSocial Integration" button is set to "Yes" in the JomSocial Integration tab within JFBConnect. Also, make sure you've mapped the FB fields to the JS fields you want them to go to.
If you're talking about Joomla fields, your username and real name should be automatically created by pulling information from FB. What are you seeing?
A website link can help us to gather more information too if the problem persists.
I am experiencing this. Logging into the website with an FB account seems to work, but the users information is not pulled. No new joomla user accounts are created.