Getting CheckMark (btnYes) to work

local function fieldHandler( event )

            local function nameEntered()
            group.mm.elements.btnYes.onTap = chooseRace
            playerName = defaultField.text
            fields:removeSelf()
            verifyName()
            end

            if ( "began" == event.phase ) then
                -- This is the "keyboard has appeared" event
                -- In some cases you may want to adjust the interface when the keyboard appears.

            elseif ( "ended" == event.phase ) then
                -- This event is called when the user stops editing a field: for example, when they touch a different field

            elseif ( "submitted" == event.phase ) then
                -- This event occurs when the user presses the "return" key (if available) on the onscreen keyboard
            -- Hide keyboard
            nameEntered()
            end

            group.mm.elements.btnYes.onTap = nameEntered

        end



        group.mm.groups['YesNo'].isVisible = true
        group.mm.elements.btnYes.isVisible = true
        group.mm.elements.btnNo.isVisible = false


        group.mm.elements.btnYes.x = 120
        group.mm.elements.btnYes.y = 200

        group.mm.elements.btnYes.x = 120
        group.mm.elements.btnYes.y = 200


        -- [SK]Ray's set hieght of text idea
        myText = display.newText( "GJYyp@^", 20, 40,0,0,  "QuadratSerial", 36)
        myText:setTextColor( 255,0,0 )
        defaultField = native.newTextField( 10, 120, 300, 30+adjustor, fieldHandler )
        -- o:addEventListener( 'userInput', listener )
        -- WARNING: The 'listener' argument to native.newTextField( left, top, width, height [, listener] ) is deprecated. Call the object method o:addEventListener( 'userInput', listener ) instead.
        defaultField.font = native.newFont( "Quadrat Serial", myText.height / 1.8 )
        defaultField.align = "center"
        myText:removeSelf()
        myText = nil
        -- Add fields to our new group
        fields:insert(defaultField)
        native.setKeyboardFocus( defaultField )
        local bkgd = display.newRect( 0, 0, display.contentWidth, display.contentHeight )
        bkgd:setFillColor( 0, 0, 0, 0 )     -- set Alpha = 0 so it doesn't cover up our buttons/fields

    end