My Outlook 2003 will recieve emails when I first start it up, but it wont recieve them after that. I have to exit and re-enter to recieve mail. It just "hangs" while trying to talk to the Exchange server. It says "Outlook is trying to retrieve data from the Microsoft Exchange server." All settings seem to be correct. I have tried a computer restart and I have tried deleting and reinstalling the account to no avail. Any advice?