Passing parameter to crystal from VB

am trying 2 pass a parameter to crystalreport in VB
With reporte
s = " id='" & CStr(iid) & "'"
.ParameterFields(0) = s
.ReportFileName = "\\xx.x.x.x\Reportes\Suscripciones" & "\" & "Contracto de Suscripcion1.rpt"
.Action = 1
End With

where par(0) is a number and a parameter in crystal.
I got the message: Invalid parameter name.
what is wrong?
How can i do it?

I mean, when i call the report i need to pass the formula, but the i do not want that the parameter screen to be displayed.

I use CR9 and this is how I do it:

VB Code:

Dim CRXParamDefs As CRAXDRT.ParameterFieldDefinitions
      Dim CRXParamDef As CRAXDRT.ParameterFieldDefinition
      Set CRXParamDefs = crxReport.ParameterFields
      
      'DISABLE PROMPTING
      crxReport.EnableParameterPrompting = False
   
      For Each CRXParamDef In CRXParamDefs
         With CRXParamDef
'GET THE PARAMETER NAME
            Select Case .ParameterFieldName
               Case "@ServiceTimeLine"
'SET THE VALUE (REPORT_PRMx is a Variable)
                  .SetCurrentValue REPORT_PRM2
               Case "@FormCode"
                  .SetCurrentValue REPORT_PRM1
            End Select
         End With
      Next