>Kevin, I don't know if this will help, but here is how I handle parms...
>
>oReport.SetParameterValue("ShowDetails", lShow);
>
>(where "ShowDetails" is a parameter)

This works, although I don't see why as it's essentially the same as what I had before:

ParameterFields Fields = _ReportInfo.Report.ParameterFields;
ParameterField pRecordId = Fields[0];
ParameterDiscreteValue ParamValue = new ParameterDiscreteValue();
ParamValue.Value = 9162;
pRecordId.CurrentValues.Add(ParamValue);

ReportSource = _ReportInfo.Report;
Refresh(); 
}