^ if it's your domain address that you want to allow clipbaord access, then it should be added.
You should put there the address of the website you want to activate clipboard (copy/past) access.
(or just open that page (address) with the browser, and then click on tools->AllowClipboard helper, you'll find the address automatically written, you just allow it) < This worked al hamdulillah
Edit : oh ..sorry .. if it already exists in the list below, then this means it's added, no need to add it again.
Just a Q : are you making your own website ?