Autofill plugin with date field

[robertocodo]

Hi all Fabrik workers,
First of all, I want to make a special Thanks for your wonderful work that simplify the job of us.
Now I have a little problem: when I use autofill plugin all works fine except a "date" field. below there is the example:
<pre>
{
"fab_reservation___Starting_from":"fab_reservation_confirmed___Starting_from",
"fab_reservation___Address_START":"fab_reservation_confirmed___Address_START",
"fab_reservation___Ending_to":"fab_reservation_confirmed___Ending_to",
"fab_reservation___Address_END":"fab_reservation_confirmed___Address_END",
"fab_reservation___Veichle":"fab_reservation_confirmed___Veichle",
"fab_reservation___Passengers":"fab_reservation_confirmed___Passengers",
"fab_reservation___Price":"fab_reservation_confirmed___Price",
"fab_reservation___transfer_date":"fab_reservation_confirmed___date",
"fab_reservation___Flight_Number_And_Origin":"fab_reservation_confirmed___Flight_Number_And_Origin",
"fab_reservation___Name_Surname":"fab_reservation_confirmed___Name_Surname",
"fab_reservation___Mobile_phone":"fab_reservation_confirmed___Mobile_phone",
"fab_reservation___Email":"fab_reservation_confirmed___Email",
"fab_reservation___Note":"fab_reservation_confirmed___Note"
}
</pre>

All fields works fine, except the "fab_reservation___transfer_date" field.

Any suggestion?