Word Press Site Opt In with Constant Contact Integration - list is missing!

Hi there, I'm working on a new lead magnet and housing the OPT IN page on my Wordpress site (divi). I'm using the "Opt in" feature in divi builder. When I go to link it to my Constant Contact List - the LIST I created for this does not show up. It shows ALL my other lists....but not this new one. HELP!