Unable to retrieve data from the SEOmoz API. Error: .

I am using WordPress on a mutli site setup. I have the latest version of Wordpress install. I also have the latest version of the WPMU DEV SEO plugin from your website. The problem I am having is it get the error Unable to retrieve data from the SEOmoz API. Error: .
in step 4 and in the dashboard. I have enter the access id and key manual as well as copy and paste. I have regenerated and access id and key and still having the same problem. What do I need to do?