Setting up Facebook Connect

Go to https://developers.facebook.com/apps/
Press Add a New App.
Enter Display Name and press Create App ID.
Choose Set Up under Facebook Login.
Next select Web.
In the next window enter Site URL and Save changes.
Next go to Settings->Basic. Enter App Domains, Privacy Policy URL, Terms of Service URL and Category.
Now you can change App Status from Development to Live, press OFF button in the top right corner.
Press Confirm to Make App Public.
Click Save Changes.
Copy App ID.
Go to your website WordPress Dashboard UserPro->Settings. Expand Facebook Integration settings and change Allow Facebook Social Connect setting to Yes.
Paste Facebook App ID and click Save Changes.
Now you should able to see Facebook login icon in the login page.