I can not send emails, my talk is disconnected and I am getting an error message of XML?

Method: ListMessagesFromIds HTTP Status: 504 Status Text: Proxy Timeout (Connection timed out. For more information on this event, see ISA Server Help.)

thats very strange. If you have wireless Internet connection, try turning off your wireless network and then back on. second could try completely only when the computer restarts, finally I would say try to wait and see if it works later