Sender Input Field Default Values in a Workflow

Hi,

I'm adding Sender Input Fields to my AdobeSign Workflow and am able to make it work using default values for Date and Text fields but can't figure out how to add default values for Radio Buttons, Drop Downs and Check Boxes. In the attached image you can see that I tried using "Checked" as the default value for the Radio Button but it didn't work. Before that I tried using the Group name for the Radio Buttons (naFunds) as the field name and the specific name of the Button (AllFundstoSeller) as the default value but that didn't work either.

Any help with this would be greatly appreciated.

-steve