title: ExtJS - filefield - select another file after submitting
body: <p>I'm working on an application for uploading files by using an ajax call using ExtJS - filefield component. I'm able to send the file without problems, but sometimes the server return an exception saying that I need to chose another file so I need to re-select another file from the filefield. However, when I already did the first ajax call, the filefield control doesn't let me to pick a new file. I click on select but the button does not work. Any idea why?</p>
  
  <p>Thanks,</p>