[Plugin: Gravity Forms ExactTarget Add-on] double opt in not working

Can’t seem to get the double opt-in feature working with the Exact Target Add-on for Gravity forms. It seems it’s not working when adding via the api method as web collect works just fine in a standard form. Is anyone else experiencing this issue and if so have you found a solution? It’s too bad, this would be perfect if the double opt-in functioned with it.

Thanks in advance for any help.