jQuery form plugin success callback not being called

I'm using the jQuery form plugin and when I use ajaxSubmit, the submission does happen (I checked for the 200 response) but the success callback is not called because I'm not seeing the alert(). Does 开发者_开发问答anyone have any ideas as to why this is happening?

$("#edit-form form").submit(function() {
    $(this).ajaxSubmit({
        success: function(data){ 
          alert("here")
        },
        method: "POST",
        datatype: "json",
        forceSync: true
      });
    return false;
  });

EDIT: forgot to mention that the form is in an iframe (idk if that'll make a difference or not) created by a fancybox.