Embed Survey Monkey form


I am trying to embed a short survey from Survey Monkey into a Pop-up that will display on the home page. I use the embed code given by SM and paste it into the Text section of the pop-up settings. When I go to preview, however, the survey isn't there. I then tried the same with a JotForm embed code and had the same problem. What am I missing? Is there a better way to embed code into Pop-up? Is it even possible?