How to pass parameter in crystal report from vb's form. i use crystal report designer inside vb. here's my code:

Dim Dsr as Card
*Card is created in Crystal Designer)

Set Dsr = New Card
Dsr.Database.SetDataSource ForPrintRs, 3, 1
Dsr.ParameterFields(0).Value = "MinDate;" & DTPicker1.Value & ";True"
Preview.CRViewer1.ReportSource = Dsr
Preview.CRViewer1.ViewReport

if i run this program i got an error "subscript out of range".

thanks 4 d help.