Parameter to mdx in ssrs

Hi,

It could be very simple question but couldnt get it out from net,so here it is

I have a MDX say

WITH
MEMBER
[Measures].[Rev] AS ([Measures].[Total Rev] ,[Dim Period].[Dim Period].&[201211])

SELECT
    { [Measures].[Rev] } on 0
,    NON EMPTY {([DimLocation].[Loc Hierarchy].Members)} on 1
FROM
[Cube_FI]

All i want is to pass 201211 from my report parameter, My report parameter name is  @Period.

Pls guide me through what should i do in MDX editor of SSRS to get 201211 replaced by @period.

I am using ssrs 2005

Thanks