Form fields as variable

Hi all I want to create a form that has variable "?fields" list, I create this list with other functions but I can't insert this list inside my form fields as shown here:

boolean1 = hiCreateRadioField(

                         ?name 'boolean1

                         ?choices list("Y" "N")

                         ?prompt "boolean1"

                         ?defValue ""

                    )

boolean2 = hiCreateRadioField(

                         ?name 'boolean2

                         ?choices list("Y" "N")

                         ?prompt "boolean2"

                         ?defValue ""

                    )

booleanList = list(

                      list( boolean1 5:0 120:20 200)

                      list( boolean2 5:30 120:20 200)            

)

form = hiCreateAppForm(

             ?name 'form

             ?minSize list(1000 100)

             ?formTitle "form"

             ?fields booleanList

)

hiDisplayForm(form)

This code is of course simplified to the point I want to ask about, this gives me the following error:

unbound variable - unbound