Error when setting up my social accounts

Hello,
In the theme panel, Social Networks menu item on the left, when I complete the field i.e. for Facebook, then the icon on very top of my site link to http://www.MySite.com/MyFBUsername instead of http://www.facebook.com/MyFBUsername

Same thing for Twitter, Youtube etc.

How can I fix this issue ?

Thanks in advance

Problem solved… The system needs the full URL (https://facebook.com/MyUserName) and not only just the username in the field…