There are several telltale error messages that can help you troubleshoot client problems. Below is a list of some of the more common error messages and their meanings. A connection with the server could not be established. This message means the client is having trouble communicating with the server that it's configured to use. This may be due to network problems or because the server is offline.
Access is denied.
This message usually indicates a filter has been set up to deny access to the person who's logged on or to the URL he or she's trying to access. Check your permissions on the server. The operation timed out. This message usually indicates either a slow Internet link or a problem with a Web server at the site you're trying to open. Try accessing a different URL to confirm if this is the problem.