crystal report error passing parameter

[Luis Moises Rojas]

What i am doing wrong?
I have a report with two(2) tables and a parameter field.

On my app i have the following (according to microsoft 101C# samples:Windows forms: Using Crystal Reports)

CrystalDecisions.Shared.ParameterValues pvCollection =new CrystalDecisions.Shared.ParameterValues();
CrystalDecisions.Shared.ParameterDiscreteValue pdvCustomerName = new CrystalDecisions.Shared.ParameterDiscreteValue();
ReportDocument rptcuentaespecifica =new ReportDocument();
try 
  {
	rptcuentaespecifica.Load(@"..\..\rptespecifica.rpt");
	pdvCustomerName.Value = cbofilename.Text;
	pvCollection.Add(pdvCustomerName);
	rptcuentaespecifica.DataDefinition.ParameterFields["@Descripcion"].ApplyCurrentValues(pvCollection);
	crvBasic.ReportSource = rptcuentaespecifica;
	crvBasic.Zoom(2);
}

but nothing works. The report bring me all data on the table and i just want the one selected on cbofilename.text
How do i pass a parameter to a report?

Any help

[mar_zim]

Try instantiating your report document.

CrystalDecisions.Shared.ParameterValues pvCollection =new CrystalDecisions.Shared.ParameterValues();
CrystalDecisions.Shared.ParameterDiscreteValue pdvCustomerName = new CrystalDecisions.Shared.ParameterDiscreteValue();
rptespecifica rpt=new rptespecifica();
try 
  {
	pdvCustomerName.Value = cbofilename.Text;
	pvCollection.Add(pdvCustomerName);
	rpt.DataDefinition.ParameterFields["@Descripcion"].ApplyCurrentValues(pvCollection);
	crvBasic.ReportSource = rpt;
	crvBasic.Zoom(2);
}