New Custom Command: Add Watermark, Page Number setting Disabled

Hi everybody,

Im trying to create a new custom command through the Action Wizard. This new command will place a specific watermark image on the pdf page. But I want it only to be placed on page 2. As the command when pressed appears on all pages. How can I do this? Im using Acrobat Pro DC to create the Custom Command. !

The Page Number setting in the Add Watermark settings is never enabled. How can I enabled it? Or if you can suggest a workaround.

Thank you so much in advance.