The COO of my company has a IBM T40 Type 2379 laptop with Windows XP Professional SP2. Here at work he places the laptop on a port replicator when at his desk and uses it standalone while away from it (i.e. conference room here, at home, travelling, etc...) While connected port replicator he uses a wired connection to connect to our network (static TCP/IP) and when disconnected from the port replicator he uses our wireless connection (Netgear WGR 614 with DHCP enabled). If he disconnects from the port replicator and reboots (whether he redocks it or not) he is unable to reconnect to the domain and thus can not log in. I have found that if I log in locally on the computer, as an administrator, I can remove the domain, reboot, and then reattach the domain. After doing this he is able to connect to the network regardless of whether he reboots or not connected or disconnected from the port replicator. Unfortunately when he brings it back into the office the next day the same problem occurs. At home he connects using his 2wire wireless router (logging in with the same profile and domain just with no real domain connection). Any ideas? Need more information or clarification?