Changing an embedded link from nofollow to follow

Hi there

I have inserted a back link in one of our blog posts to a customer's website. They have asked if it can be updated to 'follow' from 'no follow'.

I changed the SEO robot section of the post to Index, Follow however this hasn't updated from rel=nofollow.

Here is the link to the relevant post: http://puppygogo.com/index.php/easyblog/preparing-for-a-puppy

Is there a way to do this?

Thanks
Shaun