unable to send jpg, or png, via webrequest... the file gets sent, but its an empty file...

bool sendImage (string symbol, string tf) { 
  
  string fileName = StringConcatenate(symbol,"_",tf,".jpg");
  Print("FILENAME = " + symbol);
  string fileType="image/jpg";
  
  int    res;     // To receive the operation execution result 
  char   data[];  // Data array to send POST requests 
  char   file[];  // Read the image here 
  char result[];
   
  string str=""; 
  string auth,sep="-------1234097zxcvasdfqwer"; // multipart data separator 
   
  string strResult,result_header;
  //--- A file is available, try to read it 
   if(fileName!=NULL && fileName!="") 
     { 
      res=FileOpen(fileName,FILE_READ|FILE_BIN); 
      if(res<0) 
        { 
         Print("Error opening the file \""+fileName+"\""); 
         return(false); 
        } 
      //--- Read file data 
      if(FileReadArray(res,file)!=FileSize(res)) 
        { 
         FileClose(res); 
         Print("Error reading the file \""+fileName+"\""); 
         return(false); 
        } 
      //--- 
      FileClose(res); 
     }   
     
     
  //--- If there is a data file, send it to the server 
   Print("ARRAY SIZE = " + ArraySize(file));
   if(ArraySize(file)!=0) 
     { 
      //--- Form the request body 
      str="--"+sep+"\r\n"; 
      str+="Content-Disposition: form-data; name=\"files[]\"; filename=\""+fileName+"\"\r\n"; 
      str+="\r\nContent-Type: "+fileType+"\r\n\r\n"; 
      
      Print("STRING 1 = " + str);
      
      res =StringToCharArray(str,data); 
      res+=ArrayCopy(data,file,res-1,0); 
      res+=StringToCharArray("\r\n--"+sep+"--\r\n",data,res-1); 
      ArrayResize(data,ArraySize(data)-1); 
      //--- Form the request header 
      str="Content-Type: multipart/form-data; boundary="+sep+"\r\n"; 
      //--- Reset error code 
      ResetLastError(); 
      //--- Request to send an image file to the server 
      
      res=WebRequest("POST","http://localhost/uploadMqlImage",str,5000,data,result,str); 
      //--- check the request result 
      Print("RESULT HEADERS - " + str);
       
     } 
   return true;
}