Cannot see Disqus Form

Hello there,

I have just added Disqus comment system to my website. Once I have done all the procedures (subscrption, installation, activation) the form is not appearing below each post made.

I have also verified that in the Discussion page all the options were properly checked. Moreover, I have made sure to follow the guide (provided on disqus website) on how to activate it. But no luck.

Do you have an idea how I could enable it?

Thanks

http://wordpress.org/extend/plugins/disqus-comment-system/