C# GetResponse gives "optional resource assembly" error - Win Mobile 5

Question

Hi I am a newbie to CF development in C#. My goal is to insert data via web service call; Upon successful insertion, my client will get an XML status ok. I am using HttpWebRequest and HttpWebResponse - and StreamWriter/StreamReader to write/read data into stream.

The code and error message are posted below -- any idea how to fix this?

// Get response
try { using (HttpWebResponse response = (HttpWebResponse)request.GetResponse()) {

                Notify_SPOC(response.ToString());

                // Get the response stream  
                StreamReader reader = new StreamReader(response.GetResponseStream());
                XmlTextReader txtReader = null;
                txtReader = new XmlTextReader(reader);

                Notify_SPOC(reader.ReadToEnd());
                Notify_SPOC(response.StatusCode.ToString());
                Notify_SPOC(response.StatusDescription.ToString());

                while (true)
                {
                    if (txtReader.NodeType == XmlNodeType.Element && txtReader.Name == "status")
                    {
                        string status = txtReader.ReadElementContentAsString();
                        isSuccessful = status.Equals("completed");
                    }
                    else
                    {
                        if (!txtReader.ReadToFollowing("status")) break;
                    }
                }

                txtReader.Close();
                reader.Close();                    
            }
        }
        catch (WebException wError)
        {
            //Notify SPOC of web exception error
            string error_msg = "ERROR GetResponse-" + sender_phone + "; Message: " + wError.Message.ToString() + wError.StackTrace.ToString();
            Notify_SPOC(error_msg);

            //Write to a log file
            using (StreamWriter logWriter = File.AppendText(LOG_FILE))
            {
                Log(wError.ToString(), logWriter);
                // Close the writer and underlying file.
                logWriter.Close();
            }
        }

ERROR GetResponse-+1905333333; Message: An error message cannot be displayed because an optional resource assembly containing it cannot be found at System.Net.HttpWebRequest.finishGetResponse() at System.Net.HttpWebRequest.GetResponse() at MyApplicationName.Form1.Message_Insertion() at MyApplicationName.Form1.SmsInterceptor_MessageReceived() at Microsoft.WindowsMobile.PocketOutlook.MessageInterception.MessagingMessageWindow.WndProc() at Microsoft.WindowsCE.Forms.MessageWindow._WndProc() at Microsoft.AGL.Forms.EVL.EnterMainLoop() at System.Windows.Forms.Application.Run() at MyApplicationName.Program.Main()