error: name data reader cannot be found

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C#3.0

C#

Hai, i am developed a code for bar code reader which use acanlogic cs-2030 device .I my program i got 2 an error which is first error is: error 1 The type or namespace name 'Reader' could not be found (are you missing a using directive or an assembly reference?) and second is : error 2: The type or namespace name 'ReaderData' could not be found (are you missing a using directive or an assembly reference?). Here i attach code which i have a probleam.Please help me this my important assignment. I also highlight the my probleam code for your reference

public class SymbolBarcodeScanner : BarcodeScanner
            {
           private Reader symbolReader = null;
          private ReaderData symbolReaderData = null;

                public override bool Initialize()
                {
                  
                    if (symbolReader != null)
                        return false;

                   
                    symbolReader = new Reader();

                 
                    symbolReaderData = new ReaderData(ReaderDataTypes.Text,
                      ReaderDataLengths.DefaultText);

                   
                    symbolReader.ReadNotify += new EventHandler(symbolReader_ReadNotify);

                  
                    symbolReader.Actions.Enable();

                   
                    symbolReader.Parameters.Feedback.Success.BeepTime = 0;
                    symbolReader.Parameters.Feedback.Success.WaveFile =
                      "\\windows\\alarm3.wav";

                    return true;
                }