First, I removed the credentials you posted. Please be careful to never post credentials to your site or FTP in a public forum.
As to your question, you mention there was an attachment, but nothing was inserted into the post. After you upload an image, please click the green arrow icon to insert the image into the post so we can see it.
Using the credentials you provided, I did login to your site and went to the JFBConnect Configuration page you linked to. In there, I can change settings and save properly. Can you explain what issue you're running into and we'll gladly help investigate further.
Thanks,
Alex