Can’t add attachment – ‘No internet connection’

Absolutely love this plugin!

My only problem is that it is not allowing users to add attachments to their messages, without a red bar at the bottom reading ‘No internet connection’. Although, it will upload the attachment fine. But it obviously doesn’t pick up the internet connection.

The box will also not allow the user to close the upload window – the only option is to refresh the webpage.

Any ideas?

Many thanks in advance.