There are quite a few questions that need to be answered to address this issue. Has it ever worked? If not, then initial configuration is a possible issue. Otherwise, what has changed since it last worked?
In looking at the configuration, the devil is in the detail, and if you are using a remote server then connectivity, permissions, server configuration, client configuration and so on become significant.
I believe you are better off contacting Technical Support where they can speak to you and walk you through their tried and true process for handling errors of this type.