SSRS Date Parameters

Hi Every one,

I have Fiscal year parameter with years 2011-2012 and 2012-2013 and start date and end date parameters but my problem is when i select fiscal year as 2011-2012 but it will not update start date and end date my requirement is when i select Fiscal year as 2011-2012 then the start date will be 04-01-2011 and end date will 04-01-2012 and when i select Fiscal year 2012-2013 then the Start date will be as apl 2012 and end date apr 2013 .

Thanks and Regards

Sarma