Pre-Populate

When i create a form and do a form preview and pass email=something@domain.com, it populates it properly in the form. but if I insert this same form in a landing page and to the landing page I pass email=something@domain.com, it does not populate. I am using version 1.2.4

When i create a form and do a form preview and pass email=something@domain.com, it populates it properly in the form. but if I insert this same form in a landing page and to the landing page I pass email=something@domain.com, it does not populate. I am using version 1.2.4