Syntax for returning Optionbutton (Userform) caption (Error 438 with ctr.value)

Greetings,

I would like to return the name of the optionbutton that has been selected in Frame1. In addition to other optionbuttons, a textbox and combobox are included in the frame.

I used the following code:

Private Sub Label15_Click()
Dim sAction As String

For Each ctr In Me.Frame1.Controls
        If TypeOf ctr Is MSForms.OptionButton And ctr.Value = True Then
            sAction = ctr.Caption
        End If
    Next
Range("A3") = sAction
End Sub

But I get a run-time error 438 : object doesn't support this property or method. When I changed

ctr.Value

to

ctr.Object

I was able to get the desired result. I am trying to understand why I would not get the desired result using the "Value" property.

Attached is a sample file.

Thanks for your help.
Asha