We are trying to set up some load testing of an app written in ASP.net, that makes extensive use of postbacks to change the screen content after clicking submit or a link. We are having some success, but I have a button that is not showing up in Zombie, and that is added via postback. I have tried pressButton and clickLink on it. It's a submit button, with the text Next, and a long ASP.net field name. But the error keeps coming back that it doesn't exist. Is it because it was created by the postback, and can't be found by zombie?