SQL Server 2008 :: MDX Query Filtering - Return Sales For Each Customer For Past 6 Weeks

I'm having problems filtering in my MDX query.

My requirements are to return the sales for each customer for each store, for the past 6 weeks.

The catch is that I only want those customers which have had sales over 10,000 within the last week.

This is my query:

WITH SET [CustomerList] AS
FILTER(
([Store].[Store Name].[Store Name], [Customer].[Customer Name].[Customer Name]),
[Measures].[Sales] >= 10000
AND [Date].[Fiscal Week Name].&[2015-01-26 to 2015-02-01]

[Code] ....

The dates are hard-coded for testing purposes.