The request was aborted: The request was canceled while accessing webservice from Mobile app

See more:

C#

webservice

I can Upload upto 600 KB file using the following code. If I want to upload file size more than this then following error occours:
The request was aborted: The request was canceled

I have already set following code on web.config

httpRuntime executionTimeout="6000" maxRequestLength="1097152"

Please suggest me, what can I do?

Code on Mobile app:

try
        {
           
            String strFile = System.IO.Path.GetFileName(filename);

            // create an instance fo the web service
             service.DataService wser = new service.DataService();

            FileInfo fInfo = new FileInfo(filename);

            // to upload it (with the standard 4 MB limit)
            long numBytes = fInfo.Length;
            double dLen = Convert.ToDouble(fInfo.Length / 1000000);

            // Default limit of 4 MB on web server
            if (dLen < 100)
            {
                // set up a file stream and binary reader for the
                // selected file
                FileStream fStream = new FileStream(filename,
                FileMode.Open, FileAccess.Read);
                BinaryReader br = new BinaryReader(fStream);

                // convert the file to a byte array
                byte[] data = br.ReadBytes((int)numBytes);
                br.Close();

                // pass the byte array (file) and file name to the web service
                string sTmp = wser.UploadFile(data, strFile);
                fStream.Close();
                fStream.Dispose();

                //MessageBox.Show("File Upload Status: " + sTmp, "File Upload");
            }
            else
            {
                // Display message if the file was too large to upload
                  MessageBox.Show("The file selected exceeds the size limit for uploads.", "File Size");
            }
        }
        catch (Exception ex)
        {
            // display an error message to the user
            //MessageBox.Show(ex.Message.ToString(), "Upload Error");
        }

Code on Web Service:

[WebMethod]
        public string UploadFile(byte[] f, string fileName)
        {
            try
            {
                MemoryStream ms = new MemoryStream(f);
                
                FileStream fs = new FileStream(System.Web.Hosting.HostingEnvironment.MapPath
                            ("~/dataupload/") + fileName, FileMode.Create);
                
              
                ms.WriteTo(fs);
                ms.Close();
                fs.Close();

                ms = null;
                fs = null;
                          
                return "OK";
            }
            catch (Exception ex)
            {
              
                return ex.Message.ToString();
            }
        }