Child Theme Edit Header Code Issue

Hi Guys my child theme has been working fine up till last week.
It just stopped doing the override all of a sudden

if ( ! function_exists( 'simplecatch_headerdetails' ) ) :
/**
 * Get the header logo Image from theme options
 *
 * @uses header logo
 * @get the data value of image from theme options
 * @display Header Image logo
 *
 * @uses default logo if logo field on theme options is empty
 *
 * @uses set_transient and delete_transient
 */
function simplecatch_headerdetails() {
	//delete_transient( 'simplecatch_headerdetails' );	

	global $simplecatch_options_settings;
    $options = $simplecatch_options_settings;	

	if ( ( !$simplecatch_headerdetails = get_transient( 'simplecatch_headerdetails' ) ) && ( !empty( $options[ 'featured_logo_header' ] ) || empty( $options[ 'remove_site_title' ] ) || empty( $options[ 'remove_site_description' ] ) ) ) {
		echo '<!-- refreshing cache -->';
		$simplecatch_headerdetails = '<div class="logo-wrap">';
		if( empty ($options[ 'remove_header_logo' ] ) ) {
			$simplecatch_headerdetails .= '<div id="site-logo"><a href="'.esc_url( home_url( '/' ) ).'" title="'.esc_attr( get_bloginfo( 'name', 'display' ) ).'">';

				// if not empty featured_logo_footer on theme options
				if ( !empty( $options[ 'featured_logo_header' ] ) ) :
					$simplecatch_headerdetails .= '<img src="'.esc_url( $options[ 'featured_logo_header' ] ).'" alt="'.get_bloginfo( 'name' ).'" />';
				else:
					// if empty featured_logo_footer on theme options, display default Header Logo
					$simplecatch_headerdetails .='<img src="'. get_template_directory_uri().'/images/logo-head.png" alt="logo" />';
				endif;

			$simplecatch_headerdetails .= '</a></div>';
		}			

		if( empty( $options[ 'remove_site_title' ] ) || empty( $options[ 'remove_site_description' ] ) ) {
			$simplecatch_headerdetails .= '<div id="site-details">';

			if ( empty( $options[ 'remove_site_title' ] ) ) {
				$simplecatch_headerdetails .= '<h1 id="site-title"><a href="'.esc_url( home_url( '/' ) ).'" title="'.esc_attr( get_bloginfo( 'name', 'display' ) ).'">'.esc_attr( get_bloginfo( 'name', 'display' ) ).'</a></h1>';
			}

			if ( empty( $options[ 'remove_site_description' ] ) ) {
				$simplecatch_headerdetails .= '<h2 id="site-description">'.esc_attr( get_bloginfo( 'description' ) ).'</h2>';
			}	

			$simplecatch_headerdetails .= '</div><!-- .site-details -->';
		}
/*My custom code starts here*/
		$simplecatch_headerdetails .= '<div class="sponsor-us">';

		$simplecatch_headerdetails .= '<a alt="Cork City Skatepark Bolts Skateshop" title="Cork City Skatepark Bolts Skateshop" href="https://www.facebook.com/CorkCitySkatepark">';
		$simplecatch_headerdetails .= '<img alt="Cork City Skatepark Bolts Skateshop" src="http://www.skateeire.ie/wp-content/uploads/2013/12/sponsorlogontranstopalign.png" />';
		$simplecatch_headerdetails .= '</a>';
		$simplecatch_headerdetails .= '</div><!-- .sponsor-us-->';	/*My custom code ends here here*/
		$simplecatch_headerdetails .= '</div><!-- .logo-wrap -->';

	set_transient( 'simplecatch_headerdetails', $simplecatch_headerdetails, 86940 );
	}
	echo $simplecatch_headerdetails;
}
endif; // simplecatch_headerdetails

I have the child theme set up and custom style is working but my simplecatch_headerdetails.php file inside the functions folder does not seem to be kicking in.

Can someone please help.