"run with profiler" button is grayed out

Hi, I'd like to analyze the performance of my Spring application with Async Profiler.

Everything was fine when I tried with a Spring boot application.

But I have another old-fashioned Spring project, which has no main method like the first one, and I want to test this too.

So I added a tomcat server configuration, set up the artifact and so on, but I found the 'run with profiler' button is grayed out.

How to run such kind of spring application with profiler?