Your macro works for me right out of the box...
- Make sure the macro is enabled and its parent macro group is enabled.
- Change the hotkey to F1 and try again.
- If it still does nothing then run the Interactive Help from the Keyboard Maestro Editor Help Menu.
Always make certain the macro you're building actually functions in the context it's supposed to before adding complexity.
I have the Iconaholic Loud status menu icons installed on my system, so I always know when KM fires a macro.
I never use named clipboards, unless I have a really legitimate reason to do so. All copied and pasted text goes through the system clipboard, so it's better to restrict transitory usage to it and use variables for other manipulation.
I only use named clipboards for longterm storage/reuse of formatted items such as style-text, images, KM Actions, etcetera.