[Plugin: Add Link to Facebook] Delete comments – not syncing

Hello

i have installed WordPress Version 3.3.2 and Add Link to Facebook Version 1.157

everything works ok till now but i have a problem when i delete a comment

– if i delete a comment from FaceBook than the comment is not deleted on my WordpresSite

– and also if i delete a comment from WordPress it is not deleted from Facebook

What do i do wrong ?

https://www.ads-software.com/extend/plugins/add-link-to-facebook/