when using facebook like XFBML FB.init(). messages appear

Hi,

When I include the facebook like button XFBML

I get the following messages:
FB.getLoginStatus() called before calling FB.init().
FB.init has already been called – this could indicate a problem

How can I fix this?

(when I deacitivate other facebook plugin, the messages still pops up)

Thanks in advance.

https://www.ads-software.com/extend/plugins/digg-digg/