I am generating a report where it is showing all items which are in stock or out of stock

Now I am taking that choice from a cmbstatus list.. so the value is 0 is in stock and 1 if out of stock

now the sql query to run in the report is

Code:
select * from item where item.status = 1/0
( depending what the person chooses )

how do i do this.. i did create a parameter field "stat" but i am unable to generate this formula.. I am passing the value via

Code:
crxReport.ParameterFields.GetItemByName("stat").AddCurrentValue st
where st = the value chooses by user i.e. 0 or 1

i gave in the selection formula

Code:
{item.status} = {?stat}
But it gives error

Code:
A Number is required here
what to do ????

once this problem is solved i have another multitable query problem which i will give later