Multi Where clause

Hi,
I am trying to open a report based on a where clause depending on what the user selects in an optionframe on a form.

I have looked through here and google but I am getting more and more confused.
It works if I select an option with a single number behind it, but not with the two numbers. (the numbers are primary keys for the customers).

Any help is appreciated.
Thanks

Dim strWhere As String
Dim Cust As Integer

Select Case Me.frameProdGroup
    Case 1
        Cust = 300 Or 169
    Case 2
        Cust = 444 Or 329
    Case 3
        Cust = 238
    Case 4
        Cust = 220
    Case 5
        Cust = 235
    Case 6
        Cust = 180
End Select

strWhere = "[fkCustID] = " & Cust
DoCmd.OpenReport "rptStoxBase", acViewReport, , strWhere

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