The only explanation I can find is here: http://support.microsoft.com/kb/193625/en-us
Which says that the connection with the server has been reset. What is weird is that it is only one user that cannot send e-mails but she can recieve them fine. They aren't going into the message queue on the exchange server as far as I can tell. Anyone else in the organization can send and recieve fine with Outlook 2003, 2007, or OWA. I don't understand why it is just her even when it is a different workstation. So it doesn't make sense to be a layer 1 problem for sure. I don't know where to look next. Any help would be greatly appreciated.