Help need in MDX query

Hi Experts - I have a requirment to perform some set based filtering in MDX. I will explain my requirement with the example:

P1 P2 P3 P4
Customer 1 Yes Yes No No
Customer 2 Yes No Yes No
Customer 3 Yes No No Yes
Customer 4 No Yes Yes No
Customer 5 No Yes No No


I need to display the rows of the customers who has (P1 or P2 ) AND who dosnt have (P3 AND P4).

SQL equivalent: select customer from table where product IN('P1','P2')
and customer not in (select Customer from table where product='P3' OR product='P4') . This query would return Customer 1 and customer 5. I have similar requirement in MDX where I need to peroform set based operation. I have used below query but it is not returning proper results.

SELECT
NON EMPTY
{
[Measures].[Order Extension],
[Measures].[Order Qty]
}
ON COLUMNS,
NON EMPTY
{
[OrderLine].[Order Line].[Order Line].MEMBERS
}
DIMENSION PROPERTIES
MEMBER_CAPTION,
MEMBER_UNIQUE_NAME,
[OrderLine].[Order Line].[Country],
[OrderLine].[Order Line].[Territory Id],
[OrderLine].[Order Line].[Customer],
[OrderLine].[Order Line].[Institution],
[OrderLine].[Order Line].[Customer Contact],
[OrderLine].[Order Line].[Customer City],
[OrderLine].[Order Line].[Customer State],
[OrderLine].[Order Line].[Customer Zip],
[OrderLine].[Order Line].[Customer Street1],
[OrderLine].[Order Line].[Customer Street2],
[OrderLine].[Order Line].[Customer Street3],
[OrderLine].[Order Line].[Customer Phone],
[OrderLine].[Order Line].[Customer Fax],
[OrderLine].[Order Line].[Customer Email],
[OrderLine].[Order Line].[Item],
[OrderLine].[Order Line].[Item Description]

ON ROWS FROM [Reporting]
WHERE
(

strtoset("{[OrderLine].[Company].&[1]}")
,{filter(
[OrderLine].[Item].allmembers,
([OrderLine].[Item].CurrentMember.Name="WASN" OR
[OrderLine].[Item].CurrentMember.Name="39321A"
OR [OrderLine].[Item].CurrentMember.Name="39473A"
) AND ([OrderLine].[Item].CurrentMember.Name<>"39376A" OR [OrderLine].[Item].CurrentMember.Name<>"AMGST")
)
}
,[OrderLine].[Customer Active Inactive].&[A]
,[OrderLine].[Territory Id].[All]
)

filter function is trying to implement the filter on Products([orderline.item])

But, I think above query is performing row wise operation. The values of the Product would be entered thru the Parameter in SSRS. Can someone tell me how can I perform set based operations on above MDX based on my requirement.

thanks