Getting " missing parameter values" errors calling saved crystal report in winform

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C#

Visual-Studio

CrystalReports

I inherited a VB6 application that calls CrystalReport .rpt files. The reports take 4 parameters. The first three are string parameters that prompt the user for sort order fields. Each has a list of values associated with it. The last parameter is a series of primary key values.

When the report is run the code passes a string of key values to the last parameter. When the VB6 version is run the ReportViewer appears and a popup window is shown prompting for the three sorting parameter fields. (The prompting window is coming from the CR Viewer, not from the VB6 code) The report is run against a SQL Server 2012 database.

I have created a VS 2013 .Net 4.7.1 C# version of the application and I have saved the .rpt files as CR 2011 (14.0.4). Rather than prompting for the three sorting parameters, I get a CR error "Missing parameter values". Here is the detail of the error:

System.Runtime.InteropServices.COMException occurred
  _HResult=-2147217394
  _message=Missing parameter values.
  HResult=-2147217394
  IsTransient=false
  Message=Missing parameter values.
  Source=rptcontrollers.dll
  ErrorCode=-2147217394
  InnerException: 

What I have tried:

If I provide the values for those three fields the report will run, but that is not what I want. I want the CR report to prompt for the values like it does in the VB6 application and like it does if I run the report in the Crystal Report application.

Any suggestions will be appreciated.