Hi,
thanks for the help so far!
I just tried deactivating stats and then reactivating it; I entered the API key but then it went to this message;
"The API key "e19414b67698." belongs to the WordPress.com account of "joannacollie". If this is not your account, please re-enter your API key.
(it is my wordpress.com account so I didn't re-enter my API key - however the blog that I am using and referring to is on wordpress.org)
According to the WordPress.com database, this API key is already associated with at least one self-hosted blog. You can add this as a new blog on your WordPress.com account or replace an existing blog and inherit its stats history.
Add new blog to my account
Do this if this blog is new or has never been associated with your API key. This blog will be added to your WordPress.com account."
I'm not sure what to do now - as I said before that I was using the API key before fine and blog stats was working fine.
Any more help would be much appreciated,
Jo