Report Field Should Show "N/A" Based on Separate Field
===

I have the following report showing:

    F1    |    F2    |    F3    |
    `````````````````````````````
    TRUE  |   TRUE   |  FALSE   |
    TRUE  |   FALSE  |  FALSE   |
    FALSE |   N/A    |  N/A     |

As you can see, I would like to display fields F2 and F3 only when F1 is true. F1 is a false, F2 and F3 should display "N/A" regardless of their real value.

How might I do this? I've tried

    Private Sub Detail_Format(Cancel As Integer, PrintCount As Integer)
    If (Me.F1 = false) Then
        Me.F2.Visible = False
        Me.F3.Visible = False
    End If
    End Sub

But this does not change the value to the text (only removes the field, which I could settle on), but it also removes it for ALL fields; not just the one in that row. How else can I accomplish this?