[Plugin: Digg Digg] Floating bar on page

Hi,

I wish to install the floating plugin in only one page.
I read your FAQ section.

As I am a newbie to website technology I need a bit more help from you.

I want the floating bar to appear in my ‘About-Us’ page.
The slug for the page is ‘about-us’.

Therefore, the lines will be ………….

if(is_page(‘about-us’) || is_page(‘about-us’)) {
add_filter(‘the_excerpt’, ‘dd_hook_wp_content’);
add_filter(‘the_content’, ‘dd_hook_wp_content’);
}

I must be doing something wrong.
Please let me know what is it? and what should be the correct code?

Thanking you in advance for your time.
Warm regards

https://www.ads-software.com/extend/plugins/digg-digg/