action water painting

Hi, I bought your action " water painting" but I can’t get it to work. In photoshop I get the message the selection option is not available now. I don’t now what is going wrong.
Have you a solution for my problem.

Raymond Schoofs

You most likely aren’t following the instructions fully. Check the download for usage information and instructions, then make sure you carefully follow it step-by-step, including using the same layer names.