doesn't sound like a bug... maybe this will help?
Here are some general trouble shooting tips to help your troubles with the game online or on a Local Area Network (LAN).
First, be sure to disable any firewalls you have running.
· Software firewalls can simply be turned off, usually by right clicking on the icons near your clock and selecting "Close" or "Exit".
· Hardware firewalls should be bypassed by going from the computer directly to your modem, skipping any router you may have.
· Try cycling the Power on your modem.
If you have Windows XP, there is a built in Firewall that we will want to disable. Please follow these steps to do so:
· Double click "My Network Places" on your Desktop or in your Start Menu
· Click "View Network Connections"
· Right click on "Local Area Connection" and Select "Properties"
· Click the "Advanced" tab
· Make sure to uncheck the box under "Internet Connection Firewall"
If you have Windows 95, 98 or ME try using this method to reset your Network connection.
· Click on Start and then Run.
· In the Open box, type in: winipcfg
· Click "Ok"
· When the Windows IP Configuration box comes up, Click "Release".
· Then Click "Renew"
· Then close the Windows IP Configuration box
C/P from http://www.experts-exchange.com/Software/Misc/Q_21469170.html