SQL Reporting :: Passing A Multivalue Parameter To ReportViewer

I have created an ASP.NET page and included a ReportViewer on the page.

I have created a report with a parameter for an item ID for a row from the database.

After generating a multivalue parameter, I send it to the report, but only the first item in the list is displaying.

In my included code, I am using a FOR loop to generate a list of ID's I want to print a detail for (one detail per page), but eventually I am going to allow a user to select the ID's from a GridView, generate the reports and then print.

Here is the parameter definition from the report:

<ReportParameters>
<ReportParameter Name="ParmWorkOrderID">
<DataType>Integer</DataType>
<AllowBlank>true</AllowBlank>
<Prompt>Report_Parameter_0</Prompt>
<MultiValue>true</MultiValue>
<Hidden>true</Hidden>
</ReportParameter>
</ReportParameters>

---------

Here is the code that build the multivalue parameter:

List<ReportParameter> paramList = new List<ReportParameter>();
ReportParameter param = new ReportParameter("ParmWorkOrderID");
// Create the ArrayList of values to pass
ArrayList values = new ArrayList();
for (int i = 19; i < 50; i++)
{
param.Values.Add(i.ToString());
}
// Add the parameter to the list of ReportParameters
paramList.Add(param);
// Set the reports parameters
this.ReportViewer1.LocalReport.SetParameters(new ReportParameter[] {param});

-------------------------------------------

Finally, here is the filter I have on the report:

<Filters>
<Filter>
<FilterExpression>=Fields!WorkOrderID.Value.ToString</FilterExpression>
<Operator>In</Operator>
<FilterValues>
<FilterValue>Parameters!ParmWorkOrderID.Value</FilterValue>
</FilterValues>
</Filter>
</Filters>

So, why won't the reporting engine pump out one page or row (if I use a table on the report) for each of the ID's sent over as parameters?