Crystal Report and Store procedure parameter

Hi there,

I create a store procedure call
GetPayment(@dtFrom DATETIME, @dtEnd DATETIME)

After that I design a report using that store procedure I select crystal
report in this case.
I can get everything work within crystal report application I can pass the
parameter @dtFrom and @dtEnd.

However I want to use this report in my application and be able to pass new
@dtFrom and @dtEnd value. But I can't make it work.

Please advices.

Regards,
kids