Thank you a lot.
I did copy the code from disqus, here how it is:
And then I put the code exactly into an HTML embed and place it on the page. I didn't change the code at all since I have read this post saying that I don't need to edit the disqus code: http://forum.webflow.com/t/adding-disqus-to-a-blogpost-template/20556/4
I tried copying the code from disqus again and again as you said but it didn't work. I have use the DEV TOOLS and saw the error but I don't know how to fix it.
Do you have any further advice? Thank you so much.