Error message

Seems like a great plug-in. I uploaded the .zip file, and when my widget is activated and hanging out in the column, I see this: “WP Geo is not currently active as you have not entered a Google API Key. Please update your WP Geo settings.”

so that’s no big deal. I have an API key. I click the “Please update your WP Geo settings” link and I’m transferred to http://www.myblogname.com/wp-admin/options-general.php?page=wp-geo/wp-geo.php — but instead of the page loading, I get an error message: “You do not have sufficient permissions to access this page.”

What does this mean and how can I fix it?

Thanks