seo toolkit - request is disallowed by a robots txt rule

Question

I am trying to run the SEO toolkit IIS extension on an application I have running but I keep getting the following error:

The request is disallowed by a Robots.txt rule

Now I have edited the robots.txt file in both the application and the root website so they both have the following rules:

User-agent: *
Allow: /

But this makes no difference and the toolkit still won't run.

I have even tried deleting both robots.txt files and that still doesn't make any difference.