Unable to Remove Action from Hook

I added an action called “add_aiesec_pages” to the hook “admin_menu” with the call:

add_action(“admin_menu”, “add_aiesec_pages”);

However, when I try to remove the action with the call:

remove_action(“admin_menu”, “add_aiesec_pages”);

it will not remove it. I know this because when a delete my function “add_aiesec_pages”, WordPress complains.

In order to see what was going on with the actions/filters, I added the following line just before the call_user_fun_array call in the do_action function of plugin.php.

echo “<b>”, $tag, ‘ ‘, $priority, ‘ ‘, $function_name, “</b><br>”;

The output of it is:

sanitize_comment_cookies 10 sanitize_comment_cookies
init 10 wp_cron
init 10 kses_init
set_current_user 10 kses_init
admin_menu 10 aiesec_menu
admin_menu 10 add_aiesec_pages
admin_menu 10 kubrick_add_theme_page
admin_print_scripts 20 wp_print_scripts

I want to remove the sixth action listed here.

Any help would be great. Thanks.