I have a problem with three Dell Latitude D620 laptops. Each one has AC version 4, Win XP PRO SP3 and is connected to a network with cables. These laptops cannot receive messages on AC from desktop PCs. They can send messages to desktop PCs. They can receive messages from the other Dell D620 laptops. I have tried reinstalling AC several times but the result is the same. All of the desktop PCs can send and receive messages in AC without problems. Any suggestions.
