MDX for Inner Join and MAX function

Hi,

I have a SQL query for which i need MDX.

SELECT count(*), sum(balance) FROM SerialBalance b  
WHERE  balance > 0 
AND EffectiveDate = (   Select  Max(EffectiveDate) 
            From    SerialBalance sb 
            Where   SB.Subhead  = b.Subhead
            and SB.SerialNumber = b.SerialNumber 
            and SB.Branch   = b.Branch 
            and SB.Zone     = b.Zone
            and SB.Country  = b.Country
            and SB.EffectiveDate <= '2013-05-31'
            )   

I have dimension SerialBalance. I also have time dimension attached with EffectiveDate in this table. Please help as i simply got now clue on how to handle this query.

Much Appreciated

Nauman