Problem In Searching Records By Date In Sql Query For Asp.net

In my asp.net web application I used two textboxes for date1 and date2 to search records


I have used two variable in my stored procedure

@OrderDate1 datetime,
@OrderDate2 datetime,

for todays record (values for date1 and Date2)
set @OrderDate1='09/20/2007 12:00 AM';
set @OrderDate2='09/20/2007 11:59 PM';

for records between (values for date1 and Date2)
set @OrderDate1='09/20/2007 12:00 AM';
set @OrderDate2='09/24/2007 11:59 PM';

I have to search the todays records OR records between these two days
(OrderDate >= @OrderDate1 ) AND (OrderDate <= @OrderDate2)

It
works fine in my local server>>It finds the todays records by
ginving same date (@OrderDate1 and @OrderDate2) and records between two
dates

but it does not work for sql server which is outside india ...if it is problem of date format how i can solve that..

Thanks