I have a network setup as follow : Server - Windows 2003 DOMAIN Server Client - Windows XP Pro / SP1a Simple TCP/IP DHCP network connection but I found that the problem come out every 10 hours client machine logon the network connection will freeze. The client machine need to disconnect the network & reconnect or reboot the machine than become normal. How I found out this problem, is using the MS-word or others MS office software, cause the MS-word auto save feature save every five minute than found out this problem. Does anybody see this problem before. And help me how to solve this problem please. Regard, JJ