//file download.icpp    --> this operation works fine!

    SKYLARK(dwn, "download:POST")
    {  
       	String f="C:\\Users\\my\\Downloads\\rProdx.pdf";
        FileIn fi(f);
	String fn=GetFileNamePos(f); 
	                                                               //--> applicaton/pdf it's already set in my ajax!    
        String x= "attachment; filename=\"" + fn +"\"";
	ttp.SetHeader("Content-Disposition", "attachment;filename=\"" + fn +"\"" ).ContentType("application/pdf") <<  LoadFile(f);
    }

   
    SKYLARK(Adwn, "Afterdownload")
    {  
          .....
          .....
          String fn="c:\\temp\\test.pdf";
          FindFile f(fn);

          if(f.IsFile()){

               bool b= DeleteFile(fn);       

            LOG( "file deleted: " << b << EOL );
          }else{
              
            LOG( "file not found! " << EOL );                           
          }
          
    }