Uncle Gizmo, I did put it on cb1 after update event, it works find when its one value
Me.cb2.Enabled = Nz(Me.cb1.Value, vbNullString) Like "1" but it I write it like this
Me.cb2.Enabled = Nz(Me.cb1.Value, vbNullString) Like "1"
Me.cb2.Enabled = Nz(Me.cb1.Value, vbNullString) Like "2"...