Need Userform combobox to be visible when textbox equals a number value?

[jtemp57]

I need to be able to have my combobox become visible once a number value is placed in a textbox on a userform.

Here is where the textbox gets its data from:

Private Sub UserForm_Initialize()
Dim Cell    As Range
    Dim Rng     As Range
 
        With ActiveSheet
            Set Rng = .Range("O8:P51")
            Set Cell = Rng.Columns(1).Find("*", , xlValues, xlWhole, xlByRows, xlPrevious, False, False, False)
            If Not Cell Is Nothing Then
                HazardFactor_TextBox = Cell.Item(1, 1)
                MinIsoMethod_TextBox = Cell.Item(1, 2)
            Else
                HazardFactor_TextBox = ""
                MinIsoMethod_TextBox = ""
            End If
        End With


End Sub

I need the textbox data mentioned above to be able to make my combobox visible if the value is a number. Here is what I have so far but it is not working?

Private Sub ComboBox_IsoMethodSelected_Change()
If Me.HazardFactor_TextBox.Value > 29 And Me.MinIsoMethod_TextBox.Value = "DB&B" Or Me.MinIsoMethod_TextBox.Value = "Single Valve" Then
    Me.ComboBox_IsoMethodSelected.Visible = True
    Me.AddIsolationMethod.Visible = True
    Exit Sub
    End If
End Sub

Thanks