Crystal Reports Crystal Report Parameters

Message

     Hi All 

ASP.net Crystal Report.

I am using crystal report My Client is using rpt file having parameter fields 
I am setting parameter values like 
For Each lParam As ParameterField In .ParameterFields

Select Case lParam.Name
If lParam.CurrentValues.Count = 0 Then
lParam.CurrentValues.AddValue("").ToString()
next 

End If

But Still its prompting me with the parameters list and submit button. after Pressing submit button my report open.
How can i set it false so that this will not prompt me and my report shows

Please help ...................................................