Child Theme problem

Hi I created a child theme of Catch Evolution Pro and called it: Catch Evolution Pro Child Theme I've been happily working on the theme and now suddenly I get error messages in the WP control panel for example: You don't have sufficient permissions to update this page The active theme is broken. Reverting to the default theme. When I checked the Themes area in Wp I see that the main theme's name has changed to: Catch Evolution Pro Child Theme In my ftp themes folder they are labelled correctly:- catch-evolution-pro catch-evolution-pro-child Can you help? Many thanks Lizi