[Plugin: Simple Facebook Plugin] FB Like Box Dissapeared

Hey!

Everything was going fine until I modified the text for MailChimp newsletter and made it a little bit longer. When I implemented this, the whole FB Fan Box dissapeared and now I can’t get it up again, even if I delete the Newsletter widget and deleted&put again the FB Fan Box plugin.

Do you have ideas what just happened or how I can fix this?

https://www.ads-software.com/extend/plugins/simple-facebook-plugin/