This is the solutions to the error message you get when you try to change the API key in wordpress stat plugin in a host website using wordpress blogging software.
When you want to change the API key for the wordpress stat plugin or if you enter two different wordpress API keys in the same blog for two different plugins you will likely the below error message.
Error from last API Key attempt: The owner of that API Key (xxxxxxxxxx) is not on the access list for this blog (xxxxx). To be added to the access list, you must contact support.
In this case like it is said in many websites and forum, deactivating and activating the plugin or deleting it and re installing the wordpress.com stats plugin will not help you overcome this error or bug in the wordpress plugin software.
If you entered the API key into wordpress site and you need to replace it, please follow the intructions in Changing the API Key Used for Stats instructions and you will we be able to resolve this error and use your stat plugin to view statistics.
Also after adding a new API Key to your blog, you will be asked to add your blog. Make sure to click “Add blog to WordPress.com account” button.
I hope this helps someone who encounters this error with this plugin or similar plugins in wordpress.