ORIGID missing c#

[horrorhound]

I'm at a loss,  I'm just trying to obtain transaction details for ANY PPREF and PayPal is always returning "RESULT=7"  "ORIGID missing" but ORIGID is included in my request message and I'm using valid "Transaction IDs" which I copy and past from my history from paypal website.

      try
      {
        // PayPal Payments Advanced: USING Hosted Pages
        /////////////////
        // Create the request. if a token hasn't already been created...
        HttpWebRequest req = (HttpWebRequest)WebRequest.Create("https://payflowpro.paypal.com"); // Live paypal


        ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls
       | SecurityProtocolType.Tls11
       | SecurityProtocolType.Tls12;

        //Set values for paypal flow post
        req.Method = "POST";
        req.ContentType = "application/x-www-form-urlencoded";

        // Build parameter string...
        System.Text.StringBuilder PayPalRequest = new System.Text.StringBuilder();
               PayPalRequest.Append("ORIGID=").Append(txtPPREF.Text).Append("&");
        PayPalRequest.Append("TRXTYPE=I").Append("&");
        PayPalRequest.Append("TENDER=C").Append("&");
        PayPalRequest.Append("PARTNER=PayPal").Append("&");
        PayPalRequest.Append("VENDOR=myvendorname").Append("&");
        PayPalRequest.Append("USER=myusername").Append("&");
        PayPalRequest.Append("PWD=mypassword").Append("&");
        PayPalRequest.Append("VERBOSITY=").Append("HIGH");

        //Send the request to PayPal and get the response
        System.IO.StreamWriter streamOut = new   System.IO.StreamWriter(req.GetRequestStream(), System.Text.Encoding.ASCII);
        streamOut.Write(PayPalRequest.ToString());
        streamOut.Close();
        System.IO.StreamReader streamIn = new System.IO.StreamReader(req.GetResponse().GetResponseStream());
        string strResponse = streamIn.ReadToEnd();
        streamIn.Close();

        if (strResponse.IndexOf("RESULT=0") > -1)
        {
          //Success
          Console.WriteLine("Paypal Secure Token Request Success: " + strResponse);
          Console.WriteLine(strResponse.Substring(strResponse.IndexOf("SECURETOKEN=") + 12, (strResponse.IndexOf("&SECURETOKENID") - strResponse.IndexOf("SECURETOKEN=") - 12)));
        }
        else
        {
          //Failure
          Console.WriteLine("Paypal Secure Token Request Error: " + strResponse.Trim());
        }
      }
      catch (Exception ex)
      {
        Console.WriteLine(ex.Message);
      }