Overriding theme functions

I am having issues over riding a theme function in the child theme. I want to over ride the theme function catchresponsive_featured_slider(). I copied the function content into my child theme functions.php file. The site does not access the child theme function, it only appears to execute the main theme code. I received no errors when executing the code. Are there any traps for new players when trying to override the primary theme functions? Thank you