Custom Options for editors dont working

Hello.

I’ve used your code to allow access for Editors in functions.php:

function custom_options_capability ($capability) {
    return 'publish_pages';
}
add_filter ( 'gsp_custom_options_capability', 'custom_options_capability' );

But after I save functions.php, page don’t load. I found out, that the line:
add_filter ( 'gsp_custom_options_capability', 'custom_options_capability' )
is wrong or something. After I delete it, page will load with no problems.
Can you tell me what I have to do to allow access of Custom Options for Editors? I really need it.

Thank you for every help.

http://wordpress.org/extend/plugins/custom-options/